@Mikez70,
Been testing this app from the very first version and never had any problems with the map position not correct or slow to adjust.
Have tested it on many smartphones.
What smartphone are you having problems with?
Android version?
Is it rooted?
What other apps are running at the time. (whatsapp, facebook, etc, etc)
Using Bluetooth and with what?
Where you are driving is there high building, over head electric wires or just a bad area for GPS?
Also you can add this app to help.
Spoiler: gps status toolbox pro
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