Orbit already changes when using 5x timewarp (Update)

[Gordon Dry]

So, I got KSP 1.4.3 + Kopernicus Release 2 + OPM + ExtraSolar + SigmaDimensions (4x resize, 10x rescale, 4x day length).

I got a vessel in Kerbin orbit, as soon as I press 5x timewarp the orbit changes slightly.

It does not change when I press 1x

 

This really is a bummer.

I was "used to" that hard-braking out of high timewarp levels could bork the orbit, but this is a totally new attempt ...

Log:
https://www.dropbox.com/s/t3ix6y4rxbkjqtt/2018-05-07_2 KSP.log.7z?dl=1

Edit:

I should mention that this happens in "low-low" orbit, with the resized/rescaled system the atmosphere height is still 70km, but low orbit goes up to 6,100 km.

The stable orbit where the issue appeared was 200 km, so a small fraction of the maximum of what low orbit is.

I have read here and there that low orbit always was an issue.

It's like in low orbit never do timewarp inside the scene, just go 1x or leave to SPC.

 

Update:

After doing an aerobrake maneuver at Kerbin with a manned capsule, outside the atmosphere, no RCS involved, the apoapsis continues to slowly decrease and also the periapsis increases very slowly ...

@SQUAD It's like the game "thinks" after being in the atmosphere there is still some atmospheric drag left or so or it's because the periapsis is already inside the atmosphere so there has to be drag no matter what - the apoapsis after the aerobrake maneuver was 96,176 m and the periapsis was 16,288 m.
About 10 minutes after leaving the atmosphere the next reentry occurs with the initial values 96,160 m apoapsis and 16,290 m periapsis.

Edited May 8, 2018 by Gordon Dry