Several updates in the past, I'm on 2018.1, Garmin introduced a bug that takes you off the correct route on a short loop road. Sometimes the road is unpaved. Here is the second example I have posted.
From the following store:
Al's Country Store
4605 Price Rd
Gainesville, Georgia, 30506, United States
678-450-8778
Create a route down Cool Springs RD.
The route takes Joseph RD that is clearly not the correct route. I tried to attach a screen shot but it looks like some has changed.