Hi;
I rarely but on occasion use the "back to start" navigation feature. This was present on the F5, and also on my F7X pro/solar/sapphire/whatever.
Today, on the "Hunt" activitiy / app, I attempted to use "back to start" - and it displayed a QR code and stated I needed a subscription.!!
This was an existing feature, that I paid for when I brought the watch for many coins.
WTF?