Premiere 14.8.0 issue to move clip between two clips with keyboard shortcut (Ctrl)

Hello,

I have tried to move one clip in the timeline to another place in this timeline by using Control key.

Sometimes it works (the clip is inserted between two clips by pushing the other clips), but sometimes it does not works (it overwrite the other clips at the right of the insertion).

Premiere Pro Beta : 14.8.0 build 28 (R). 

Computer : Lenovo laptop windows 10 last version