-Sturmpios with defensive upgrade (and minesweeper if I recall correctly) can pick up weapons, but they dont use them at all- they still use their Gewehrs.
-Sometimes british vickers emplacement remains unoccupied- I have encountered this one while loading a saved game, but maybe it can be fixed (screenshot attached).
EDIT: -When playing 2vs2 with AI, the ostheer AI had both PzIV and Panthers on the field, despite their Doc- I noticed it after reloading a saved game, so maybe it's a load game bug.
-Skirmish Commander don't camo in cover (Defensive Army Doctrine ability).