There is a new bug with light which appears after you unload the chunk then come back to it. The glitch is mainly visible in a building (covered)

Steps to reproduce:

Spawn into the realm. I was on a world from 2019. Fly away from the chunk so that it unloads, at least 500 blocks away, then come back to the spot you were before.

Expected Results:

no change in appearance in the surroundings.

Observed Results:

Random light from no apparent souce

Workaround:

Disconnect from the realm and rejoin it

Photo evidence:

Spawning in

Flying away then returning