I was on the previous version of the IOS app and the 3.1 Firmware on my Edge 510 and was getting fairly consistent Bluetooth uploads. 95% of the time. I was on 3.1 as 3.5 was maybe 50% of the time. Anyway, when 2.13 was released, I had the crashing problem and reinstalled the app. Unfortunately, I couldn't upload at all after that. Even after the 2.13.1 release, I still couldn't upload. Tried installing 3.5 on my 510 it still won't work.
Contacted Garmin support and they told me to uninstall the app, reboot the phone and reinstall. Unfortunately this still doesn't work.
Does anyone have any ideas how to get auto uploads to work again. I asked Garmin to just release the old app.