After a hotel room update on the road, I ended up with an XT2 that would restart every five minutes. I was convinced it was related to the FW, and Garmin just needed to push an update or let me roll back the update to fix the issue. Took a week of troubleshooting, and a lot of back and forth with Garmin Support. They we just about to send me an RMA number (return material authorization) when I got last ditch instructions on how to reset the Bluetooth connection. I'm not going to lie, everything listed was something I had already done. However, it got me to thinking that maybe my issue wasn't with the device itself, it had to do with how the Tread App interfaces, Android (Apple could have the same issue to be honest) Bluetooth prioritization, setting conflicts, or just strange bugs that hide in code.... So the inner Test Engineer in me came out to troubleshoot. Here are the steps that resolved my issue. I have an Pixel 8 Pro phone, so you will have to adapt to your own device if you are having a similar issue.
Remove the Tread App from your Phone
Open the app properties
Force Stop the App
Delete the Cache
Delete the data stored in memory
Uninstall Tread from your Phone
Unpair your Zumo XT2 from your Phone
On your phone, open Bluetooth settings and select the Zumo XT2. Then select "Forget".
On the Zumo, go to Settings > Phone> then Forget or Unpair
Restart Both Devices
Reconnect Both Devices
Fix your Settings
I hope this helps someone out there. If nothing else, yes the XT2 is worth it. You can't use Basecamp, and I know that freaks out legacy users. Garmin still has a long way to go to shed the shackles of their legacy software, but this is a decent first step.
Since this keeps happening, I contacted Garmin Support through their Chat function. They are having me return my unit and exchange it for a refurbished unit.
There are several reports of this doing nothing, that the refurbished exchanged units do the exact same thing right out of the box. I have previously declined in the past, because I didn't want some unit that was poorly handled to replace my pristine unit. However, I'm close to tossing my XT2 into a landfill so I'm not sure it matters. I will update with a resolution if this ever gets resolved. Until then, I cannot recommend buying a Zumo XT2. The Zumo XT has all of the classic limitation of a Garmin device, but it works. If you are in the market, save some pennies and get the smaller screen and functioning unit (Zumo XT)
I recently had this issue again. I resolved it by deleting my phone from my Zumo XT2, then deleting the tread app from my phone.
I then reinstalled the app, logged in, reconnected to the XT2, and all was working again.
I can't definitively say that this is happening because of over the air updates to the XT2, or if it's because I made too many changes for the device to synchronize without breaking its Bluetooth connection. It is a very annoying problem though.
One club member mentioned using Garmin Explore (or maybe it was Connect) to transfer to the XT2. I'll check that one when I can.