When players other than the host in a LAN world try to place blocks, most of the time the blocks will appear for a fraction of a second, then disappear.
What I expected to happen was...
The blocks would always (Maybe not always, but very very commonly) be placed successfully.
What actually happened was...
Most of the time, the blocks would appear for a tick (I suppose) then disappear. This doesn't happen for the host.
Steps to reproduce:
Path 1 (If you have another premium account or friend):
1. Open a world to LAN.
2. Tell your friend or your alt account to join the LAN world.
3. Tell your friend or alt account to start placing blocks.
4. The friend or alt account should observe the blocks most of the time not being placed successfully.
Path 2 (If you don't have another premium account or friend):
1. Open a world to LAN with an offline account (Offline accounts can be most easily accessed using MagicLauncher).
2. Join the world with your premium account.
3. With your premium account, start placing blocks.
4. Observe the blocks most of the time not being placed successfully.