On this page within the Compendium https://roll20.net/compendium/dnd5e/Spells#h-Spells there is a link called "Bard Spells by Level" which links to a level sorted list of spells, but it's not filtered by class. I haven't cross checked, but it looks like it's probably every spell in the PHB (and XGE).
It looks like all the "Class by Level" links on that page deliver the same result, even though they do produce unique URLs.
The user can scroll upward — if they know to — and find a place to set the search parameters again and generate a list. My particular concern is that I have brand-new caster players. Every piece of friction and bit of misinformation is a little irritant that makes VTT seem more and more like homework. Whenever I have to correct the Compendium I fear it makes them feel like the whole thing is very complicated.
Keith, is there somewhere other than the forums I should be reporting this bug?