Hello, my name is***** to Justanswer! Give me just a few minutes to look up some specifics, I'm working on this now.
Sometimes there can be too much stuff loading on the Garmin, and it can slow it down. We can factory reset it, and as long as it isn't a hardware failure, it should clear it up.
Your device will automatically reset. Follow the on screen prompts then take your device outdoors to acquire satellites.
Please tell me the results.