Shows 2 of the members of the party with full death saving throws, and perpetually says loading character, I tried reporting it in the beta tab but the link is down.

I can view their character sheets from the campaign, and I tried restarting all the encounters, I don't know what I can do beyond that currently, thank you in advance for any assistance!

edit: the party just leveled up if that helps at all

I've had the same issue. The first time only one of the characters was in this perpetual loading state. Now it looks like 3/4 of the party is like this.

i havent found a way to fix it yet, you can still edit their initiative, just cant see their health or if they die

I'm having the same problem with multiple campaigns.

Also, the same characters that show like this in the encounter tab appear with no info in the "Characters" tab in campaigns from the app.

They did not solve this yet, D&D Beyond is getting worst by the day since Wizards acquired it. 

I found a fix for this issue.

Go to the character's sheet that is not loading and change the viewing status from private to public (or vice versa) via the Character settings section (very last option) and back again (or get the player to do this if you're having issues accessing their character sheets in the Campaign screen).

This will fix the character in the Encounter Builder....it may come back again though but just repeat it if it does and you'll be able to carry on.

I've found that this can be done while the encounter is live as well.

It hasn't come up again, since we haven't played, but ill tell them while we are playing if it does happen. thank you for telling me the fix though!