Edge 840 freezes during 7hr ride - after reboot Training Effect not saved

Just did a big training ride, using navigation with a course.
In the last 10 minutes I noticed the screen of my Garmin Edge 840 is stuck/frozen.
Buttons and touch screen do not respond.
After holding power button for about 10s it does a reboot and opens the current activity. No problem.

Then after I saved and synced, i noticed on my Garmin watch my training status is "Recovery".
Went in Garmin connect, sync/reload everything again. Still the same.
Just had a look on the web and turn out none of the data under 'Training Effect' is there. (Wtf?!)

Anything you can have a look at Garmin-Maeve
I can upload the files i you tell me what to upload.

Would be great to know:
1) why does the device freeze
2) why all data is there, except for the my Training Effect data
3) any way to recover the data

0 DennisF 1 month ago

Exactly same happens from time to time on my Edge 1030+, and there were suggestions this is somehow connected with LiveTrack function which causes Edge to crash and restart. I don't even have to press power button, it restarts automativcally after short time. After restart the Edge is running the same activity, but paused, and I just resume with start nutton. All stats are there intact, except for Training Effect - it's lost and starts from zero.

Suggestion - try disabling LiveTrack.

0 Jasperth 1 month ago

Awaiting your input Garmin-Maeve

Also Garmin-Blake Garmin-Joey Garmin-Matthew Garmin-Dan what are your thoughts on this issue? Do you need me to send you any files?

0 Jasperth 1 month ago in reply to DennisF

Thanks for the tip Dennis. I do not use LiveTrack however, all switched off already.

0 ZIDANRO 1 month ago

Unfortunately, I have noticed this phenomenon with Garmin products since the days of Fenix 5 and Edge 1030. If the device is restarted, the calculated score for Training Effect is close to 0.
I haven't found any solution for this.
The calculation seems to be somehow in a variable only in the volatile memory of the device and nothing stored, so that on restart it can return to where it was.