Bottom of chat window is blank

I recently encountered a strange bug in the Roll20 chat where I cannot see the most recent rolls made in chat - it's just a blank white screen. More curiously, when I scroll up to the chat that I can  see, it is abruptly cut off, even mid-template for the character sheet we're using. Whenever someone (myself or others) roll something new to chat, the white space acts almost like a buffer, revealing more of the older rolls that I couldn't see previously. I suspect  it is a problem with the default roll graphic, but I'm unsure exactly how. At one point, the problem went away entirely, but the whitespace buffer returned almost immediately after someone rolled a bunch of raw dice formulae (specifically "/r 1000d1000"), and the new buffer was sized perfectly to obscure these rolls (but as more chat messages get sent, they too are revealed as usual. This bug persists upon reloading the site, and clearing my browser cache. It as far as I am aware only affects the chat tab, and does not extend to the "View all chat entries for this game >>" page. I'm very confused.  

cute gif of the bug in action&nbsp; <a href="https://cdn.discordapp.com/attachments/244255591927644160/736765927613399160/wat.gif" rel="nofollow">https://cdn.discordapp.com/attachments/244255591927644160/736765927613399160/wat.gif</a> I checked other games I am part of and this is the only one with this bug. Also update, I had the GM kick me and re-invite me to game and it's STILL THERE. Specs since I forgot in initial post: Macbook Pro (15-inch, 2018) Mac OS Catalina 10.15.6 Google Chrome Version 84.0.4147.89 (Official Build) (64-bit)

"Clear Current Chat Log" seems to have fixed it for the time being, but I still have no clue how the bug began.

Revisiting this (because it's back) I think it's a problem with the specific Starfinder character sheet we're using, and not with Roll20's chat system as a whole.

I'm seeing the same issue in both the Pathfinder 2e and Official Starfinder sheet-based games.&nbsp; Last night during a GenCon PFS2e game, the chat window started "whiting out" after about 3 hours. The text and graphics were there (you can inspect the DOM and see them) and you can drag the content and see the draggable content, but it was all whited out in the chat window.&nbsp; Popping the chat out into a new tab (double clicking the chat icon) shows the content, but popping it back into place reverts back to white out.&nbsp; Refreshing the page did not fix it. Today, during setup for GenCon 3-00 Starfinder game, the bottom of the chat went white as I logged in.&nbsp; Same steps above resulted in the same behavior.&nbsp;&nbsp;

get your gm to erase the chat it works for me

I've been experiencing the same thing, as have other members of my party in our Pathfinder campaign. It looks like there's a bug with the overflow CSS for rightsidebar div. You can fix this on your own by opening developer tools and removing the overflow styling. Right click on the whitespace and select inspect to bring up the developer console. Make sure that you're viewing the "Elements" tab and scroll up until you find the "rightsidebar" line. In the right panel, scroll all the way up and locate the "overflow" styling and uncheck it. This will reveal the full chat window until you refresh the window. This change will not persist; you will have to do this every time you experience this issue. Hopefully the roll20 devs can get this suited soon.