Insert time-stamp hot key not working

I am not able to insert the current time-stamp in One Note pages.

Alt-Shift-d properly inserts the date

Alt-Shift-f properly inserts date & time

However, Alt-Shift-t presents a cross-hair cursor 

The cross-hair cursor moves around and I can select an area on the page, which I can capture to the clipboard

Can someone tell me how to switch Alt-Shift-t back to time-stamp insert?

Thanks!