This happens on Ubuntu 20.04 LTS as well (I know it's not out yet, but I found the same bug during testing).
LSB Release: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu Focal Fossa (development branch) Release: 20.04 Codename: focal
gnome-screenshot version: gnome-screenshot 3.33.90
uname -a: Linux ubuntu 5.4.0-12-generic #15-Ubuntu SMP Tue Jan 21 15:12:29 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
This happens on Ubuntu 20.04 LTS as well (I know it's not out yet, but I found the same bug during testing).
LSB Release:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Focal Fossa (development branch)
Release: 20.04
Codename: focal
gnome-screenshot version:
gnome-screenshot 3.33.90
uname -a:
Linux ubuntu 5.4.0-12-generic #15-Ubuntu SMP Tue Jan 21 15:12:29 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux