I mean that you can open entities in multiple panels that stack in the panel on the right side. Like if you have a ticket linked in another one and open it it will not completely close the already open one in the right panel but stack it to the right side to quickly switch through them.
I also tested this a bit more and it seems to be broken everywhere? I just noticed it in tables first but apparently this is also not working anymore when opening stuff from lists or even links directly?
Ok, I found the cause for this: The experimental feature “Auto close right Panels” was for some reason enabled now? I assume that’s some test from your side because I definitely did not enable that myself.