Started happening after the 1.20.50 update and hadnt ever happened before the update. Occasionally when I enter or leave the nether all natural light will not exsist. For example the world looks drained of color as if raining during the day in overworld or is dark like a cave in the nether. Things like torches and fire still give off light and give off light when freshly placed as well. The only way to get rid of it seems to be reloading the game itself as logging off and on the realm doesnt seem to fix it and netiher does returning the opposite way through the portal from when it started. Not a big issue just annoying when you have to keep alt f4ing to reset every time it happens. None of my other friends seem to have the problem but I also happen to be frequenting the nether 40+ times a day whereas they only go 1-3 times a day.