1. Open Editor, select Stratis
2. Place player unit and add to Init line: player addEventHandler ["InventoryOpened", {systemChat str _this;}];
3. Place any weapon crate nearby
4. Start mission, stand right on the crate looking slightly above it so that there would be no "Inventory" action on it
5. Press I to open Inventory and observe that event handler returned only new weapon holder while inventory screen has both Ground and Crate tabs active.