There is definitely SOMETHING very weird. I went into the Debug Menu and did a clear user data.
After I did that, the device started with me having to re-enter locale etc, but low and behold, OLD waypoints were still in the device. So my guess is some kind of file corruption going on.
I already send an email to Garmin
Update:
Garmin asked for the Starting Point coordinates and the End Point ones and are investigating.
IMHO it's not a problem with the MAP, but of corruption of one of the files, but that is just guessing
Update2:
Email back from Garmin
Thank you for contacting Garmin Thailand through email
As we have checked your starting point and ending point on our device Drive 51, we found that the route can work as normal. However, our technical team suggest to Reset Default Setting the device.
Before Reset Default Setting please follow the basic instructions below.
Connect your Garmin device with PC.
Select Garmin folder and copy GPX folder to desktop.
Rename the current file to current1.gpx at the desktop.
Then Reset Default Setting on your Drive 50
After Reset Default Setting connect your Garmin device with PC again.
And copy the current1.gpx back to GPX file in the Garmin folder
The device DriveAssist 50 is out of service at this moment. Therefore, we do not have any components of the device for replacement and the device is not able to be updated anymore.
Tried, but same issue. so not much help. Oke going to use the GPS as a DashCam only and start using my phone which I personally don't like as making the routes with Basecamp is much more fun and easier.