I've got an annoying problem that only happens every now and then. Every now and then, during a brushing session with my Sonicare toothbrush, the app says it lost the connection with the toothbrush.
It says "Unable to connect. Guidance is no longer available." Then it says "To continue brushing, place your toothbrush on the charger and then remove to restart the timer."
It works fine on my old Samsung Galaxy S7 phone. I have tried several things like closed all apps, full battery, deleted Sonicare app cache, deleted app data and cache, connected toothbrush and logged in/synced all data, re-installed app and logged in google/email, reinstalled app and cleared bluetooth cache and storage.
Even the latest One UI 4.0 didn't help. I can't get in contact with Philips because the warranty period is over. 😕
When you switch from Windows 7 to Windows 10, some software will no longer work and the developers of that software need to update their software. It's the same for Android and iOS! As mentioned by @Pugs1957, the app needs to be updated to work with Android 12.