The bug
Block hitboxes are no longer visible behind transparent blocks, such as stained glass or water. This doesn't apply to normal glass blocks.
Linked issues
discovered while testing 1
is cloned by 1
is duplicated by 1
testing discovered 1
Attachments
Comments 2
Actually back as of 1.16.2. MC-198103 However sadly that is resolved as won’t fix.
I'm unsure if the following was ever intended behavior but this bug also prevents the entire hitbox of a transparent block from being seen.
Ex: If you look at a block of ice in a lake, you see a square above the ice, but not the other sides of the hitbox, which used to be visible.