Ok, so what I see going on is that the Tank is not obeying Z-layer for some reason. Other tokens are flipping back and forth, but for some strange reason that token is ignoring all Z-layer commands and staying on top. For a bit we thought that it was related to who had control, but once all tokens involved in the test had the same controller the situation was the same, the tank was still ignoring the Z-layer commands. Tested to see if the tank having vision was affecting it (turned vision off)....nope. Still on top compared to tokens that had vision. Tested to see if player view was different than GM view. It is IF the GM does not have control assigned to the GM. If the GM has control over the tokens then the GM sees what the player sees in this case. Short version: This one token, and any copies of the token, are not obeying the z-layer commands. Possible options: 1) do not assign control of the Tank to the players. Use an API to have the Tank follow the players around or move it manually. 2) Assign control of the Tank to only the player driving it. Presumably their character is in the tank and not on it. 3) File a bug report with the Devs on the matter. Perhaps they can see what is going on with this one Token.