Audrianna Rock

I've had this happen to me in 19w06a once, but it was relatively minor. It happened moments ago in 19w07a, and was... not so minor. Torches, lanterns, and glowstone all had the issue in a rather large location. Like others have said, replacing the light causes them to be recognized, but otherwise they are not. Random lights are recognized, and always appears to be a perfect line where the light cutoff appears. 

In 19w06a, it was upon loading up Minecraft that this occurred. Exiting and restarting, as well as restarting server did not resolve the problem. For 19w07a, it was after returning from the Nether at night that this occurred. Again, restarting client and server did not resolve the issue. The location that is missing lighting is several hundred blocks worth, with seemingly random square of lighting that works.

I'm playing in 19w05a on a server. The issue I've been seeing with the latest snapshot is not the same as what is reported here. However the one that I would say is the same, has been closed as a duplicate.

We originally had item frames sitting on the ground in both the nether and overworld. These frames were empty, or had maps in them. Upon updating to form the previous snapshot, these frames did not render visually, nor could we see the hit box for them, we did have the closed caption show "item frame filled" when loading into the locations where these frames were at.

We had issues in the previous version where they wouldn't load for the client, and logging out and back in would then render these frames. We have tried multiple times though on the new snapshot, without having these frames appear. 

We have also attempted to create new frames and place them, this results in the item frame vanishing. We have tried placing on chests, placing on floors, placing on walls, and placing on barrels, none of which has worked. And again, we have no hitbox for the item frames either, so if we try to interact with where it should be to place an item, nothing happens. It does not appear just in the wrong location, it does not appear anywhere.  As such while likely related, this may not be the exact same bug. But as I said above, the one regarding item frames not rendering at all was marked as a duplicate for this bug.