Real time position is lagging

I have the exact same problem on the same watch and with an S25 Ultra phone. 

It can be fine for a bit then lag for a while then go fine again. 

I wondered if it was something to do with map caching, mobile signal etc but so fsr cannot find any logic/consistency with it! 

I would say lagging because the app is still working perfectly.
I did not have that trouble at first (few years ago I would say).

I "solved" it by using the phone position instead of the watch position in the app.
It is a bit annoying because they are not in sync but at least I see the "blue arrow" moving.

 3974453 how did yiu change that setting and where please... Is it in the Garmin Explorer settings or the watch either way the more help on how to change this the better.

Thanks in advance 

It's in the app.
You go on the map, then the layers. There, you'll find the parameters and at the very bottom, you need to desable "prefere the device position"
(not sure how it is in english since I use the french version)

hope it will help, even though I hope they will correct this for real.