UE5.3 | Viewport Bug?

Hi there
I seem to face a viewport problem:
If i’m in perspective mode, everything works - as soon as I change to another viewmode, such as top, front, back… etc. nothing is shon. no matter if as standalone viewport or split-screen as shown in the pic below (sometimes, UE even crashes when I change the viewmode from perspective to another)- any clue how to fix this? Thank you

How did you go with this bug?
I am running 5.4.4 and getting the same thing. but its only in one project.
if i load other levels it works fine but for some reason my main level which i stream other levels to it’s just not showing in top, sides, bottom, but perspective is fine

Working on a 2d project so this is really annoying bug