Apparently, I am able to reproduce this quite easily with Xubuntu 18.04 as seen in bug #1815429 . The workaround which works for me is to add the ppa:xubuntu-dev/experimental and upgrade xfwm4 to version 4.13
Apparently, I am able to reproduce this quite easily with Xubuntu 18.04 as seen in bug #1815429 . The workaround which works for me is to add the ppa:xubuntu- dev/experimenta l and upgrade xfwm4 to version 4.13