Enter the editor preferences.
Go to hotkeys and find the command for reimport asset.
Assign Ctrl+r as the hotkey.
Close the hotkey editor and open a static mesh in the static mesh editor.
Press Ctrl+r
Result: Ctrl + r is already assigned to "Toggle Realtime" and thus will fail to import asset as desired
Expected: Assigning already assigned hot key to alert user.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-19094 in the post.