After more investigation, it seems like a door cannot be placed on a block that does not have a block beneath it. This definitely shouldn’t be the case, right?
To illustrate further... if I place a block on another block, then place a door on that, the door will place. If I place a block on top of a block, then break the block on the bottom, I cannot place a door on the topmost block that is still there. The door places for a moment, then immediately disappears as if it never left my inventory.
This is still an issue: also affects all placement above a certain Y Coordinate. This seemingly affects my entire Realm Server now...
Posting this comment here as well since this seems to be related to my issue ...
After more investigation, it seems like a door cannot be placed on a block that does not have a block beneath it. This definitely shouldn’t be the case, right?
To illustrate further... if I place a block on another block, then place a door on that, the door will place. If I place a block on top of a block, then break the block on the bottom, I cannot place a door on the topmost block that is still there. The door places for a moment, then immediately disappears as if it never left my inventory.