Same as with Microsoft, I thought I had more posted on LinkedIn, but either I had not or LinkedIn is somehow hiding the posts. Anyway, after 2 (!) monthly (!!) bans (!!!) for raising tickets for the same unresolved issue (sadly, can't post screenshots of the tickets to confirm that, since they are too old, and of course we are not allowed to see all of them) I was finally able to get acknowledgement of the issue from Steam. Or kind of. They suggested to use beta-version, since it had some changes, and that they plan some more changes. It did improve things, for sure: while focus stealing (multiple times) is still a thing when the the app is started, it does not seem to do that mid-game. Why it required so much pain to get even to this point? No idea.
