Please look at video: https://www.screencast.com/t/dmAHdzkBvs0a
You will notice in the video that first Cut action doesn’t work, second Cut action works. Try it yourself.
When you type on a cell, an additional textarea in activated (editor) and most of the program’s functions don’t work in that mode – the default browser context menu is activated instead (this is what you are doing during your first cut). You need to finish edition either by pressing Enter or changing focus to another cell. Then you can click on the cell again (single click, not double) to select it and cut the content. The content is removed from cell only when you paste it to another cell/s.