Random session restore failures

Hi there. Programs that sometimes fail to restore across boots: Kate Konsole Konqueror Thunderbird Sometimes when Konsole restores it forgets the "Paper" schema and reverts to default. Sometimes the sound starts muted and I have to enable it with kmixer which tells me that I have two mixers, PulseAudio and "HDA Intel PCH". Maybe that's because I end the session with earphones plugged in and start it with them unplugged, not sure. I had these problems before upgrading to Buster, but they seem to be happening more frequently recently. Is there somewhere session restore errors are logged? Unrelated ping: currently System Guard does not show network speed: http://bugs.pearsoncomputing.net/show_bug.cgi?id=2398 Regards, Philip Ashmore