Fenix 7 sapphire solar stops tracking activity without warning

I have noticed latelry that my Fenix 7 Sapphyre Solar stops recording hiking activity without any type of warning, visual our auditory. 


I realise it after a while, only because I look at the map on the screen and see that tracking has stopped. It has happened several times. I restart the activity, but tracking does not continue (the red line stays where the watch stopped the activity by itself). Yesterday, totally by chance, I realized that after about 10 km (4 hours) the watch did not allow me to use the point-and-go feature on the map because it did not have enough memory available. It was only about 30 mins after this that the recording stopped. 

I don't have any music uploaded or apps running in parallel, only the native hiking map, nor am I following a pre-loaded track.

I did not have this issue for more than a year. It seems to be something new that happens after an update.

Any clues or solutions to this problem?


Thanks!