When I tried to add more values to the selection attribute to generate variants, the modal is being closed unexpectedly. Please check the recording:
https://www.awesomescreenshot.com/video/11279456?key=4235a4789ce3e6bef9a4c9cc235c015e

Update (M.Sz.):
The issue with adding values to selection attribute is now fixed via IBX-3872.

However, the modal still closes unexpectedly in these cases:

• when removing values from dropdown element (using "x" when dropdown is not expanded)
• when removing values from taggify element, affects e.g. integer attribute