I have a 2016 Delorme/Garmin Inreach (orange) and I started having issues last summer, and it has worsened. Whenever I turn on my Inreach, it will not get an accurate gps signal/position unless I do a factory reset and then it grabs location INSTANTLY and then I can use it just fine until I turn it off. I typically turn it on once per evening and send a message to mapshare, and I'm only moving about 60 miles per day. Clear skies, outside, giving it 10+ minutes to find a signal and nothing works until I do a reset and it then finds me immediately.
