If i tab out of ST3 to some other application but then come back I am occasionally confronted with a non responsive ST3 when i use the mouse wheel to scroll. i can click into the editor and move the cursor, I can click into and drag the mini-map etc but the mouse wheel no longer scrolls the editor display.
If i again click out and use the mouse wheel in any other application it works just fine. After doing this it also starts working in ST3 again until I tab out again whereon it may or may not stop working again.