Having the same problem. Very annoying!
Same here. System volume and notification volume both 1 notch off of silent and all sounds still too loud, even my custom notification sounds.
Edit: S21 Ultra
Same to me ...
With every update my messenger, tiktok and whatsapp volume are distorted to either off or max with all calls crackled-unable to have a conversation with anyone on apps or regular phone call. I have done cache clean, rebooted, uninstalled apps, nothing works other than having phone reflashed. I can't keep reflashing as center is over an hour away. Never had an issue with Samsung phones previously. Very displeased with Samsung and their warranty. I need this fixed or a new phone. And who remembers all their logins for all apps on their phone?