Encounter Tracker Crashes to Blank Page

When using the encounter builder to run a combat, once you start the encounter and try to click on an npc in the initiative list, the page goes blank. You have to refresh the page to see the initiative list again. I cannot select any npc to see their attacks, profile, etc.

I have also been getting this issue. So far only with certain npcs/monsters, specifically a "brain in a jar". I've tested multiple encounters with this monster added, and in each one the page crashes when I try to view its stat block from within the Encounter page. 

Yeah, I can confirm that it does not crash with every monster. 

It seems the offending monsters are from specific sources, for example:

Most monsters from VRGtR make the encounter builder crash, I tested that the following do:

https://www.dndbeyond.com/monsters/priest-of-osybus

https://www.dndbeyond.com/monsters/bodytaker-plant

https://www.dndbeyond.com/monsters/boneless

https://www.dndbeyond.com/monsters/carrion-stalker

https://www.dndbeyond.com/monsters/carrionette

https://www.dndbeyond.com/monsters/deaths-head

https://www.dndbeyond.com/monsters/dullahan

https://www.dndbeyond.com/monsters/gallows-speaker

https://www.dndbeyond.com/monsters/greater-star-spawn-emissary

https://www.dndbeyond.com/monsters/gremishka

This monsters from VRGtR does not make it crash:

https://www.dndbeyond.com/monsters/elise

Most of the Candlekeep Mysteries monsters make it crash, I tested that the following do:

https://www.dndbeyond.com/monsters/arrant-quill

https://www.dndbeyond.com/monsters/lichen-lich

https://www.dndbeyond.com/monsters/animated-broom

https://www.dndbeyond.com/monsters/animated-chained-library

https://www.dndbeyond.com/monsters/canopic-golem

https://www.dndbeyond.com/monsters/cloud-giant-ghost

https://www.dndbeyond.com/monsters/constructed-commoner

https://www.dndbeyond.com/monsters/corrupted-avatar-of-lurue

This NPC from CM does not make it crash: https://www.dndbeyond.com/monsters/bak-mei

Other (quick) tests I did with new sources:

I could not find any offending stat-blocks in 'Strixhaven', nor in 'Fizban'.

Hope it helps to sort the bug out, I was planning to use the EB with some VRGtR monsters, but I guess I'll wait :'-(

thanks!

Please submit a support ticket including this list of monsters. This is a known issue they are trying to resolve, and staff has said that submitting a ticket is the best way to make sure this info gets to the right people. Note that today is a holiday in the US, and support staff don’t work weekends, so it willl likely be next week before you hear back. 

I am still working with the support team on this.  A team member created an encounter under my account and they are troubleshooting this.

Please see the thread here:

https://www.dndbeyond.com/forums/d-d-beyond-general/bugs-support/128633-cant-view-creatures-in-combat-encounters#c6