I am affected too. While the window flashes, the console prints out a lot of:
gtk_widget_size_allocate(): attempt to allocate widget with width -5 and height 15 about once per flash. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1846445 Title: 19.10 gnome tweaks flashing and unusable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zulucrypt/+bug/1846445/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs