window.activate fails for window class

[jack99999]

i'm using beta 5.

This fails:
subprocess.Popen(["krusader"])
retCode = window.wait_for_exist('krusader.krusader', timeOut=3)
window.activate('krusader.krusader',switchDesktop=True)

This is what i used to have for a long time. it has stopped working recently and i finally got round to finding the problem.
What happens now is that the Krusader window is created but AutoKey does not switch to it.

This works:
subprocess.Popen(["krusader"])
retCode = window.wait_for_exist('Krusader', timeOut=3)
window.activate('Krusader',switchDesktop=True)

AutoKey shows:
Active window information:
Title: 'Krusader'
Class: 'krusader.krusader'