The GPS signal for your handset is impacted by your environment.
This includes buildings, below ground usage etc. In urban environments with tall buildings, buildings which use a lot of glass, you may experience a disruption to your GPS signal accuracy.

To prevent your location puck, the blue circle inside a safety area being ‘bounced out’ of a safety area, adjust the size of the safety area.
‘Bounced out’ is where your location appears on a map, at a location different to actual.
By expanding the safety area size, it ensures you remain inside the safety area and the plan does not auto complete.