There are a number of forms which have child forms, such as Template Configuation. If you launch a child form from the parent the window comes to the front as expected. However, to cancel the child form you have to move the window aside and kill or cancel the parent form first. Also, some errors, such as attempting to Add a blank template, result in the app hanging and you have to kill it using sudo.
it all works as expected for me. Can you explain more, such as exact steps to reproduce?
maybe this is another duplicate of bug #3022 Are you on ubuntu and do you have overlay-scrollbar-gtk2 installed?
No feedback from reporter and works for Paul, closing.