Fenix 6S keeps re-pairing with Android phone

Hi,

Fenix 6S Sapphire watch keeps wants to repeatedly re-pair with phone. Endless device setup requests to enter code from watch. Device paired successfully for 1yr+.

After pairing, after no more than 1 day, device will insist that you must enter code on the watch to re-pair. The watch, Android app, Windows Express app and phone are are all up to date.

Have already rebooted watch, removed paired phone and device from each other several times. No difference whatsoever.

Have also tried uninstalling / reinstalling Garmin Connect on phone, as well as clearing it's data after removing device prior to reinstalling & re-pairing. No difference.

I see it reference via Google search but no real resolution. Anyone else experiencing this, and have managed to fix it?

Fenix 6S Sapphire

Samsung S20+ / A32 running Android 11

Windows 10

Android app + Windows Express app + watch + phone are all on latest available updates.