Bug or by design?

Hi guys!

I'm quite curious about a small feature with tip icons/bubbles. When you click on the bubble icon it shifts down and back up, as seen in the Fill the Blanks activity here:

https://h5p.test.schulcloud-thueringen.de/fill-in-the-blanks#example=61113

I don't recall this happening before, so was it part of a previous update? I don't think it's much of an improvement and would love to try and prevent it somehow. Have already tried css but no joy. I guess it's a js thing.

Many thanks!

Paul