When you Rearm at a vehicle, the only Event Handler i found, was "Take".
When taking multiple items at once from a vehicle eg. medpack and a smokeshell, and you track the parameters, it only shows one of the items. Also the container you are taking from, seems to be yourself.

A nice consistent fix would be awesome. eg. the "Take" event handler correctly being called with the container (vehicle) and being called with an array of the items.