On LAN: Use Item/Place Block Changes Block Model and Texture

In a LAN server (as player), whenever I use the use item/place block key (Right click by default on PC), the block I am targeting instantly changes to another model with another texture. Many of them are purple and/or seem to be development or testing textures.

Steps to Reproduce:

1. Join a LAN server as player (not host)
2. Press the use item/place block key while targeting any block

Observed Results:

The block changes into another model with another texture. The host player does not see this effect. When attempting to place a block, the block in hand does not place, and the block in world is subject to the bug effect.

• Disconnecting and re-joining the server makes the blocks return to their default state, but the issue is still present and continuous.

Expected Results:

The block targeted should

a) do nothing if the player's hand is empty

b) have a block placed on it if the player is holding a placable block, or

c) activate the block targeted if it is an activatable block, e.g. a door or chest.

Screenshots/Videos:

Photo:

(the "dirt block" seen in the photo says "upd ate!")

Video:

example video.m4v

^{Video Alt Link:}

^{https://youtu.be/X19X4PuJxX0}

Notes

• Bug was not present before latest Beta update.
• Bug happens to player who was originally hosting if we trade places (i.e. I host and they join my game.)
• Both creative and survival mode have this bug
• Each block's "alternate" is consistent to that block, but seemingly random.
• Fences turn into tilled soil, which then allows the player experiencing the bug to jump over the fence (the host sees this as me just clipping through the fence).
• If the block activated is a door, it changes into a floating button but does not open (player experiencing the bug cannot go through the seemingly empty doorway).