I think this is an engine bug, rather than being something in TWW code TWW_movebug.tsvg](/assets/uploads/files/1563141832074-tww_movebug.tsvg)
I want to move one AA from Moscow to Smolensk in the enclosed save; and am trying to do so via truck.
- To help demonstrate clearly, start by selecting undo all, to cancel all the moves so as to start from a clearer point.
- Move one truck from stalingrad to Moscow
- Now select one truck and one aa gun to move to smolensk.
When ever I try to select them both and to the move, it asks me which Trucks to use, since some of the trucks have different amounts of movement remaining. Once I select the trucks to use, and click ok, only the truck ends up moved, the aa gun isn't moved at all. No matter which trucks I say to use, the aa gets deselected. So I couldn't get the aa to move.
Now if instead, I send trucks out of moscow, one by one, until all remaining trucks in moscow have the same amount of unused movement, and then try to move the AA with one of them, it works correctly.
A similar issue occurs with trains.
It seems like the issue is this: when trying to move units via trucks (And the associated mech-inf based land transport rules), if there are multiple land units in the same location with differing amounts of movement, then the menu for selecting which units to move comes up.
However when the menu is brought up, something "loses" the set of units that are supposed to be transported along with those units, and there's no way for it to reacquire/reselect those units. So they can't get transported in that situation.
It wouldn't matter for regular units, which are incapable of land transporting, so this issue should only occur in quite narrow situations.