When I click on a file in "Recently played on the keyboard" in order to listen to it, afterwards, automatically some other file starts playing. Is there any way of turning this off?

Something seems off.  With Cmd. L you open a playlist window.  If you hit your qwerty keyboard space bar when you got the playlist window already opened, whatever is inside your playlist immediately plays.  Have you accidentally just begun a playlist instead?

When I click on a file in "Recently played on the keyboard" in order to listen to it, afterwards, automatically some other file starts playing. Is there any way of turning this off?

I might be wrong, but I don't there is such option. I tried finding it but no luck.