The bug
Items of transparent blocks (such as stained glass or honey blocks) no longer render behind transparent blocks, such as water or stained glass.
Related issues
discovered while testing
is duplicated by
relates to
Attachments
Comments

[media][media]

This behaviour is back.
Particles can't be seen through colored glass or water.

For particles not rendering behind water and glass there's MC-161917. This ticket here is specifically about transparent block items.

Seems to be back in 1.16 Pre-Release 2
[media]
Edit: Sorry, misrelated the Issue. I found the specific Ticket for this one.