On minecraft Realms, lighting in many chunks have become useless until removed and replaced.

the pyramid a friend built on my realm when he was the only one logged in inside the pyramid and logged out and logged back in had all of the light provided by torches, and sea lanterns and the new lanterns become useless and proceeded to have 100's of mobs to generate in a normally well lit area. the pyramid he has built is roughly 150blocks by 150blocks at the base of it. other chunks on the realm have the same issues with lighting. relating to the chunk loading issue possibly causing lighting issues chunk loading has also caused entities to vanish (I.E. item frames, sheep, armored horses, and items in item frames.)

i will attach a copy of the realm world we are using. the pyramid is located near "naznines smaller pyramid". the pyramid in question is very large in proportion to a naturally generated dessert pyramid.