Goal: Let users shift drag items in inventory to split it.
Bug: First time after making inventory panel visible mouse click events will interrupt the Shift modifier. Second time works fine. It looks like when a UniformGridPanel gets focus it interrupts the keyboard held down event.
I also tried using the Is Key Pressed function but it returned false as well.
Left Shift Modifier
I get the same with ctrl and left mouse button… makes holding modifiers unusable 
Current version 4.25.3 Linux
If any1 come across this check https://forums.unrealengine.com/t/is-input-key-down-in-widget-issue/72271/9 If your widget is focusable then upon clicking on it, it will gain focus and interrupt key pressed events. Solution is set IsFocusable=false on your root widget or i guess individual widgets if that won’t work.
