While being disguised, if you enter vehicles (boats, minecarts, etc.), invisible armor stand that represents player's nametag will get frozen in space until you exit vehicle

[TheJoshue]

Title explains the issue, here is proof:

The idea for a solution i have is very simple and i am sure it'll be effective: Just remove invisible armor stand that represents player's nametag when he enters vehicle and unhide their vanilla one; and of course when they leave vehicle, just do the same backwards (hide vanilla nametag and give previous one)