I have had the 830 for a good few years now and it’s been great (except in the rain). I have solved the rain issue with a remote.
But recently it has started acting oddly with regards getting routes/courses on to the garmin. Activities are absolutely fine and appear on Strava or elsewhere pretty well instantly.
Routes used to be fine, but it became hit and miss and then just miss. I solved the issue after other attempts with a full reset of the garmin. Easier and better than I expected as profiles were not lost or maps I had preloaded. Result.
But I am now left with a new oddity. It will not connect to my house WiFi saying it is unprotected so does not ask for a password. It is secured before you ask!
No idea how to fix it, other than ignore it, or go out and upgrade.