Using Alt+Drag to make a rectangular selection loses editor focus

Question

If I use Alt+Drag to make a rectangular selection in PhpStorm, the program moves focus to the menu bar (like when you press just Alt in Windows apps). I then need to do click Esc to restore focus, thus making the short-cut rather pointless.

I've tried checking the Disable mnemonics in menu option at File → Settings → IDE Settings → Window Options but it only hides the underline character in menu items.

Is there a decent way to make rectangular selections with the mouse?

Answer 1

Known issue, please see IDEA-87408