What appears to be happening is that the player does not have control over editing the world such as placing or breaking blocks, and the blocks are reverted to their original state because the glitch makes the character invalid and is supposed to be dead. and once the player relogs the character officially dies, then the soft lock occurs and the character is being treated as a separate entity and cannot walk or break etc. In a separate test (not recorded) the player could still scroll through the hotbar and put items into their hot bar and hold them.
Lachlan A
had the same issue in singleplayer. I recorded it here:
https://www.youtube.com/watch?v=Azxdl5HHDVw
What appears to be happening is that the player does not have control over editing the world such as placing or breaking blocks, and the blocks are reverted to their original state because the glitch makes the character invalid and is supposed to be dead. and once the player relogs the character officially dies, then the soft lock occurs and the character is being treated as a separate entity and cannot walk or break etc. In a separate test (not recorded) the player could still scroll through the hotbar and put items into their hot bar and hold them.