So currently I’m building something which a replicate of a bedroom in roblox but a problem occurred that roblox suddenly deleted my lightning, right after I saved the game and then I restarted my roblox studio because when I played the game it keeps resetting the lightning to default but when I opened the project again all of the lightning already deleted.
It was saved since yesterday and something weird happened today where the lightning would always set to default and all of the things that I mentioned above disappear when I tested the game in roblox studio and return to normal after I stopped the test after that I saved the game and tried to restart roblox studio but suddenly all of the things inside of lightning is deleted.
Probably should re-install your studio since this is unusual behavior and may cause problems in the future.
Don’t know if you tried or if the lighting was normal after you’ve published it, but you could try going to version history here: Game Settings > Places > Place Version > Version History in the drop-down.
If that doesn’t work or you’ve already tried, nothing you can do except re-installing studio and re-doing the lighting.