I was able to re-create this using today's focal ISO (2020-01-15) The only difference was as PRTSCR is now handled by `screengrab`, I selected "Edit In.." and selected `lximage`.
[ sony vaio ultrabook (i5-9400u, 4gb, intel haswell-ULT) ] ** Tags added: focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1831847 Title: lximage-qt drawings not always visible To manage notifications about this bug go to: https://bugs.launchpad.net/lxqt/+bug/1831847/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs