Hi @Dmandub, welcome to the Sonos Community!
I’m sorry to hear that you’re having issues with missing content and random playback. This is definitely a strange one as the voice assistant (Sonos Voice Control) shouldn’t change what content you see in the Sonos app or have tracks unrelated to your request play.
You’ve done what I would suggest, which is removing SVC to test if the tracks come back. Since it didn’t resolve the issue, I would recommend reaching out to our support team to troubleshoot this with them. They have the necessary tools available to look into your system and see what’s going wrong.
I hope this helps!