5.7 Lightmass Issues (Crashes and Bugs)

Hi, if anyone know anything about baked lighting in UE5.7 I would be eternally grateful for some help.

I have been having non-stop issues with lightmass and volume lighting in 5.7 it seems unusable it’s so buggy. Is it some kind of legacy system to epic now and they just don’t support it?

Any time I do any kind of Lightmass build for my level everything just seems to break. If you look at the video.

Bug 1) Toggling on Visualise > Volumetric Lightmap it does nothing other than make the editor laggy as if it has toggled on the Visuals of the little balls, but you just can’t see them.

Bug2) Start play and stop play take about 20 seconds to start and stop playback of the game now whereas before they lightmass build or if I clear it the game starts and stops instantly.

Bug3) It now just gives me an error any time I try and save the map so I had to make another copy just to keep working on my level.

Bug4) Attempting to reopen the map often leads to a GPU crash. I have a 5070ti.

Am I the last person using baked lighting or am I doing something very wrong? My settings are in the video.

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