Modal dialog blocks all projects

When opening any modal dialog in a PyCharm instance it blocks all other instances as well.

It becomes a problem when working in multiple projects at the same time or even when to copy settings from one window to another.

I believe this is a very old problem. I've checked the posts and people have complained about this for 'years', and it hasn't been fixed. In 2008 it 'wasn't in the plans'.

Is there a solution for this?