iOS 15.6 problems

I have Apple compatible Signia hearing aids that I have synced to my iPhone 11 without difficulty for the past 3 years. Two days ago, that ended after i updated to iOS 15.6. Now, I can sync the hearing aids through the accessibility settings, but they lose sync if the Bluetooth is interrupted even for a moment, they won’t reconnect automatically like before, but must be manually restored through settings. That’s not very convenient when you’re driving.

Before someone tells me “it’s the app not the update”, I don’t access my hearing aids via an app. I access them directly through iPhone Accessibility Settings. The only thing that’s been changed is the update.