Gps drift after 3.3/3.4 update

What is your SYNC Region?
Middle east

What was your Old SYNC Version?

What is your current SYNC Version?

Do you have Navigation?

Please describe in detail your issue below
I recently bought sync 2 to sync 3 kit and installed it , everything gps was good but it was on 3.0 update which had the old carplay waze speed issue and i was interested in updating to 3.4 and so i did but now after the update the gps started drifting and i even tried downgrading to 3.3 latest but the issue is still there. I did master reset after each update/ downgrade.
And the gps signal and position test shows more than 10 green boxes which is good but it still has gps drift.
Does the sync apim need time to relearn or learn so that it stops or is there a problem and if there is how do i fix it?

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