Windows captures include an annoying, non-uniform and non-transparent border of background contents:

(Example screenshot showing ~2 pixel border on top, 10-15 pixel border on right, left, bottom. Capture was done using keyboard shortcut for "Capture active window")

Window captures should capture windows only, nothing around it. Trying to crop it manually often fails with +/- 1 pixel so it is hard to handle.

Please fix this. OS is Ubuntu 20.04.1 LTS, installed via snap, version is 1.7.2.