When a player sits on a Rustic chair, the player appears to be standing to other players.

MC version: 1.12.2
Mod version: 0.4.3
Modpack: All the Mods 3

this still isn't working in the latest sevtech(3.0.8), are you pushing the action to the server like carts do? The client doesn't seem to be updating server of the change of position/state. this means that the player renders to all others on the server in their last known position and in the standing position. couple it with a water stream and the player can be 100's of blocks away from where the client thinks they are. However the client seems to update the position on leaving the chair. not sure if the extra details helps, but i thought you should know.

NHL