[X2Go-User] Single Application session fails

I am running x2goclient on my laptop and the x2go server is on my dekstop, both systems are running xubuntu 20.10.

Running an xfce session works perfectly but running a single application session doesn't. It appears to work until the application pops up momentarily and then disappears. The application *is* still running but is not displayed.

The end of the session.log shows:-

Info: keyboard blocking directory created:
'/home/chris/.x2go/C-chris-50-1610816188_stRdigikam_>
Info: Keycode conversion is off
Session: Session started at 'Sat Jan 16 16:56:30 2021'.
nxagentImportProperty: WARNING! Failed to convert remote window
[79978240] importing property [>
WARNING: Invalid window in ClientMessage xclient.window [0x7a6].
WARNING: Invalid window in ClientMessage xclient.window [0x7a6].
WARNING: Invalid window in ClientMessage xclient.window [0x7a6].
WARNING: Invalid window in ClientMessage xclient.window [0x7a6].
WARNING: Invalid window in ClientMessage xclient.window [0x7a6].
WARNING: Invalid window in ClientMessage xclient.window [0x4a00072].
WARNING: Invalid window in ClientMessage xclient.window [0x4a00072].
WARNING: Invalid window in ClientMessage xclient.window [0x4a0007b].
WARNING: Invalid window in ClientMessage xclient.window [0x4a0007b].
WARNING: Invalid window in ClientMessage xclient.window [0x4a00082].
WARNING: Invalid window in ClientMessage xclient.window [0x4a00082].

Does this indicate what the problem might be?

-- Chris Green