Possible fix for the long standing issue of ClimbPro crashing while navigating within an activity. Also applicable to Fenix series. (During a designated climb while using ClimbPro, scrolling through the different data screens provokes a crash).
What fixed it for me:
"Walk" is an activity. "Navigate" is an activity. In Activity Settings, both "Walk" & "Navigate" have ClimbPro set to on. Out of the box, the subsidiary ClimbPro settings ("Data Field") were different (one, "Walk" I think, was "Pace", the other ("Navigation") was "Total Ascent").
In the above configuration, the watch crashed/rebooted when scrolling through screens while climbing.
I reset the "Data Field" setting to be the same on both activities (Walk & Navigation). I chose "Pace", but I suspect having any selection, provided it is the same, may work.
With these settings amended as above, ClimbPro now works on a Walk without the device rebooting.