Having this issue on 1.18 up to 1.18.2
Win 10 and android. On Realms.
Spawner worked for a few minutes and then stops. Log out and in and it worked. Next day it didn't work even if logged out. Now have two spawners, zombie and spider that won't work for days now. And other people on the realm say same thing as well as another that says there is nothing in their spawners.
I've also made sure my farm I was making was completely dark. But the first day I was making it. I closed it off and it was still lit up inside even though there was no light source at all. Logged out and came back next day and it was completely dark in there.
I've seen this ssue with the light not going away after blocking the area off a few times now.
On the minecrafts page introducing the new addons. It specifically said "And if you run into any hiccups or have general feedback to share, we'd love to hear your thoughts." Which brought me here.