Watching the Video, this might be a race conditios. The installer is running, installing packages, as one would expect. After some time, the 'screenlock' kicks in, which is detected by os-autoinst and acted upon. The installer shows back up and 'seems to terminate right afterwards' (possibly an additional ESC sent to yast?
Move to new QSF-y PO after I moved to the "tools"-team. I mainly checked the subject line so in individual instances you might not agree to take it over completely into QSF-y. Feel free to reassign to me or someone else in this case. Thanks.
I guess we have missed the moment to investigate, but screensaver is disabled for the scenario, so mentioned cause should be resolved by now. However, I see that test is quite unstable, will file a ticket for that.