We're not getting much response from Roll20 in this thread, so I'll copy paste here - apparently this thread is more visible to devs. I've found a few more compendium links that time out. Also, I've found a number of broken links, wrong links, and links with weird behavior. Especially, I'm finding that PHB and VGtM compendium is bit of a mess. Anyway here is list of compendium issues I've found so far. I'll be updating them as I find more (I'll add Sr. K's find as well to the list). NOTE: I only have access to PHB, Xanathar and VGtM compendiums. PHB : Personality and Background link is broken. The link is <a href="https://roll20.net/compendium/dnd5e/Personality%20and%20Background#h-Personality%20and%20Background" rel="nofollow">https://roll20.net/compendium/dnd5e/Personality%20and%20Background#h-Personality%20and%20Background</a> which goes to non-existent page. PHB : Feats link times out (though sometime will work but takes a long time to load). The link is <a href="https://roll20.net/compendium/dnd5e/Rules:Feats/#h-Feats" rel="nofollow">https://roll20.net/compendium/dnd5e/Rules:Feats/#h-Feats</a> VGtM : Beholder lore link times out. The link is <a href="https://roll20.net/compendium/dnd5e/Lore:Beholders" rel="nofollow">https://roll20.net/compendium/dnd5e/Lore:Beholders</a> VGtM : Yuan-ti lore link times out. The link is <a href="https://roll20.net/compendium/dnd5e/Lore:Yuan-ti" rel="nofollow">https://roll20.net/compendium/dnd5e/Lore:Yuan-ti</a> VGtM : Spells & Items link, links to some other compendium - namely <a href="https://roll20.net/compendium/dnd5e/Creature%20Codex#h-Spells%20%26amp%3B%20Items" rel="nofollow">https://roll20.net/compendium/dnd5e/Creature%20Codex#h-Spells%20%26amp%3B%20Items</a> MM : The Items chpater link links to Mrodenkainen's Tome of Foes instead, namely <a href="https://roll20.net/compendium/dnd5e/Mordenkainen%27s%20Tome%20of%20Foes#h-Items" rel="nofollow">https://roll20.net/compendium/dnd5e/Mordenkainen%27s%20Tome%20of%20Foes#h-Items</a> PHB : If you click on "Subclasses" link (from the Classes and Subclasses heading, not sure why there is two links to begin with - are these auto-made?) it takes you to the same page as if you clicked Barbarian which doesn't make sense. The link is <a href="https://roll20.net/compendium/dnd5e/Barbarian#h-Subclasses" rel="nofollow">https://roll20.net/compendium/dnd5e/Barbarian#h-Subclasses</a> PHB : Speaking of, if you click on Barbarian, you get a sort of disambiguation page where it purports to find three different barbarian instances (one of them which links to Xanathar's barbarian info page and two of them are the same link). It should just link directlly to PHB barbarian page. When you click Barbarian in Xanathar it behaves as it should and links directly to Xanathar's barbarian page. XGtE : Downtime link times out. The link is <a href="https://roll20.net/compendium/dnd5e/Rules:Downtime%20Activities?order=6#content" rel="nofollow">https://roll20.net/compendium/dnd5e/Rules:Downtime%20Activities?order=6#content</a> (credit Sr. K) VGtM : There seems to be a slew of links in the compendium that behave similar to the barbarian page in the PHB, namely that they link to some kind of "disambiguation" page that in large part seems unnecessary (as all the links link to the same page) and should ideally behave like the Barbarian link in XGtE in that they should know to link directly to the page in the appropriate compendium given the context. I'm assuming these class of bugs all have the same underlying cause. Every link under the "Spells & Items" section of Volo's behave this way, the links are (there are probably more that I missed): <a href="https://roll20.net/compendium/dnd5e/Wall%20of%20Water#h-Wall%20of%20Water" rel="nofollow">https://roll20.net/compendium/dnd5e/Wall%20of%20Water#h-Wall%20of%20Water</a> <a href="https://roll20.net/compendium/dnd5e/Funerary%20Brain%20Jar#h-Funerary%20Brain%20Jar" rel="nofollow">https://roll20.net/compendium/dnd5e/Funerary%20Brain%20Jar#h-Funerary%20Brain%20Jar</a> <a href="https://roll20.net/compendium/dnd5e/Mind%20Blade#h-Mind%20Blade" rel="nofollow">https://roll20.net/compendium/dnd5e/Mind%20Blade#h-Mind%20Blade</a> <a href="https://roll20.net/compendium/dnd5e/Mind%20Carapace%20Armor#h-Mind%20Carapace%20Armor" rel="nofollow">https://roll20.net/compendium/dnd5e/Mind%20Carapace%20Armor#h-Mind%20Carapace%20Armor</a> <a href="https://roll20.net/compendium/dnd5e/Mind%20Lash#h-Mind%20Lash" rel="nofollow">https://roll20.net/compendium/dnd5e/Mind%20Lash#h-Mind%20Lash</a> <a href="https://roll20.net/compendium/dnd5e/Shield%20of%20Far%20Sight#h-Shield%20of%20Far%20Sight" rel="nofollow">https://roll20.net/compendium/dnd5e/Shield%20of%20Far%20Sight#h-Shield%20of%20Far%20Sight</a> MToF: The link to the Preface leads to a page that doesn't exist: <a href="https://roll20.net/compendium/dnd5e/CategoryIndex:Preface#content" rel="nofollow">https://roll20.net/compendium/dnd5e/CategoryIndex:Preface#content</a> (credit Ace Trainer Andrew) MToF: Clicking on the link for "Lore" connects to the Creature Codex like the VGtM link for Spells & Items: <a href="https://roll20.net/compendium/dnd5e/Creature%20Codex#h-Lore" rel="nofollow">https://roll20.net/compendium/dnd5e/Creature%20Codex#h-Lore</a> (credit Ace Trainer Andrew) MToF: When filtering the Monster List to only include VGtM, it also lists all of the monsters from the Creature Codex. Unless opening those links in a new tab, it leads to a page that doesn't exist. (e.g: <a href="https://roll20.net/compendium/dnd5e/Aatxe?fromList=Aatxe&Name=&Speed=&expansion=1" rel="nofollow">https://roll20.net/compendium/dnd5e/Aatxe?fromList=Aatxe&Name=&Speed=&expansion=1</a> whereas opening it in a new tab leads to <a href="https://roll20.net/compendium/dnd5e/Aatxe#content" rel="nofollow">https://roll20.net/compendium/dnd5e/Aatxe#content</a> , and if filtering to both VGtM and CC, the link opening in the original tab is <a href="https://roll20.net/compendium/dnd5e/Aatxe?fromList=Aatxe&Name=&Speed=&expansion=1&expansion=13#content" rel="nofollow">https://roll20.net/compendium/dnd5e/Aatxe?fromList=Aatxe&Name=&Speed=&expansion=1&expansion=13#content</a> ) (credit Ace Trainer Andrew) PHB: All of the various "Dragon Ancestry" links under "Dragonborn" race are broken. The links are: <a href="https://roll20.net/compendium/dnd5e/Black%20Dragon%20Ancestry#h-Black%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Black%20Dragon%20Ancestry#h-Black%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/Blue%20Dragon%20Ancestry#h-Blue%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Blue%20Dragon%20Ancestry#h-Blue%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/Brass%20Dragon%20Ancestry#h-Brass%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Brass%20Dragon%20Ancestry#h-Brass%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/Bronze%20Dragon%20Ancestry#h-Bronze%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Bronze%20Dragon%20Ancestry#h-Bronze%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/Copper%20Dragon%20Ancestry#h-Copper%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Copper%20Dragon%20Ancestry#h-Copper%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/Gold%20Dragon%20Ancestry#h-Gold%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Gold%20Dragon%20Ancestry#h-Gold%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/Green%20Dragon%20Ancestry#h-Green%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Green%20Dragon%20Ancestry#h-Green%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/Red%20Dragon%20Ancestry#h-Red%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Red%20Dragon%20Ancestry#h-Red%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/Silver%20Dragon%20Ancestry#h-Silver%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/Silver%20Dragon%20Ancestry#h-Silver%20Dragon%20Ancestry</a> <a href="https://roll20.net/compendium/dnd5e/White%20Dragon%20Ancestry#h-White%20Dragon%20Ancestry" rel="nofollow">https://roll20.net/compendium/dnd5e/White%20Dragon%20Ancestry#h-White%20Dragon%20Ancestry</a> PHB: Rules link links to Mordenkainen Tome of Foes instead, namely, <a href="https://roll20.net/compendium/dnd5e/Mordenkainen%27s%20Tome%20of%20Foes#h-Rules" rel="nofollow">https://roll20.net/compendium/dnd5e/Mordenkainen%27s%20Tome%20of%20Foes#h-Rules</a> SRD: If you search for a combat rule in the Compendium and click on it, it goes to a generic combat page instead of the requested rule. Example: Search for saving throws and click on Combat: Death Saving Throws . (credit Kevin ) MISC.: This is an issue that is only present in-game . When looking at rules entry for Spells and clicking on any of the links to spell list by class at the bottom of the entry, it leads to broken link. This seems to be due to the site's security policy on iframes not jiving with the link, namely, the console log reveals a SAMEORIGIN error message. Note that the links themselves work when accessing external to the game (since accessing compendium directly bypasses having to load within an iframe). See this post for details (credit Desecrator 7). PHB (and may be others?): Majority of the spell entries have poor formatting with no paragraph breaks where there should be in the "spell card" (for lack of better word) portion of the description (the latter half of the entry). See this post for an example. I've randomly checked other spells and all of them had this issue except one. (credit Damien). PHB: Link to druid class times out. The link is <a href="https://roll20.net/compendium/dnd5e/Classes:Druid" rel="nofollow">https://roll20.net/compendium/dnd5e/Classes:Druid</a> (credit Tourmi).