managed to get to end of demo after a few runs. new bug i found is that being overload will reverse thrust direction and have total braking, dragging modules on and off adds to hull indefinitely, does not happen with add on(plating + plating).
I think you may need to try the downloadable version, It appears to be web version error. Or lemme know in clearer the action you tried to perform, so I can replicate them and identify the issue
Replicating doesn't result in any issue. It may be web version issue. There are new update and downloadable version as well. It will be more stable than the web