Selection frame that disappears in a request


I have an issue about the “selection frame” which appears when you make a request with functions. I mean the different buttons that appears when you click on a function (the 2 arrows, delete and the interrogation point), when I click on the function to delete it for example, the frame disappears often when I put the mouse on it and it can be very frustrating because I don’t understand why.

Here is a video (sorry I did not find how to merge the video online so I made a WeTransfer) :