I'm having the same issue on my dual monitor setup: 1080p and 4k with 1.2 scaling.
➜ spectacle -v spectacle 18.04.0 - A Dearth of Dank Memes Wow, 3 years and no solution yet! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1773246 Title: spectacle w/ rectangular region and dual monitor moves display views To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kde-spectacle/+bug/1773246/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs