Android Auto & car naviagtion: Wrong position and wrong instructions shown when departing from planned route

[sjvudp]

Description

I had decided to drive home from shopping, but use a longer route to warm-up the motor a bit more.
Having set up the home position, navigation started normally, but I left the route after about 500 meters.
I did not pay much attention to the navigation screen (as I knew the route anyway), but suddenly the display announced that I'm almost home when I wasn't!
It seems as if the navigation ran some kind of simulation mode, following the planned route, while I was driving a different one.
Then after some more hundred meters, the position suddenly updated to the actual one, and from there on navigation worked as expected.

Steps to reproduce

Unsure how: The mobile phone should have had a valid GPS position, because GPS was on for a long time.
Also: So far I usually followed the suggested routes.

Actual result

OsmAnd shows a moving map with a position that is not the actual one.
Distance from correct route was more than 100 meters, maybe 200 meters (while in town, i.e. <= 50km/h).

Expected result

When departing from the planned route, there should be a notification and an update to the actual route being taken.
At least much sooner as observed.

Your Environment (required)

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Review this CAREFULLY before posting your issue!

OsmAnd Version: 4.8.6
Android/iOS version: 13
Device model: CPH2371
Crash-Logs: ?

[yuriiurshuliak]

To help us investigate further, please provide additional details:

• Export your profile settings by going to Menu → Settings → Export and attach the file to this ticket, compress it into a ZIP file.
• Share the exact start and finish coordinates of the route or attach the GPX track where this issue occurred.
• Ensure your app is up to date. The current version is 4.8.6, but recent updates might have addressed this issue.

[vshcherb]

Simulation happens if you enable it in Route preparation screen and indeed could be running in Android Auto as well. Simulation reset after each app restart or if you switch off manually in Route Parameters