I have a massive room for spawning monsters in and it has a "light switch" that controls the ceiling (which is mostly redstone lamps) and after turning it off, the lighting has to be manually updated everywhere, and it takes a very long time. first screencap is the lights on, second is the lights off, and third is about 10 minutes work on updating the lighting.
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Please force a crash by pressing F3 + C for 10 seconds while ingame and attach the crash report here.
Please zip (or 7z) the world and attach it to this ticket.
what would the crash report help with?

Versions, Gamemode, Memory usage etc.
Bug nevermind, this ticket is already resolved.