Your tilt calibration appears to be invalid

[Sykkel]

Last week I was looking into some of my ride files.
Have a few out/back rides and did some "check calibration"
Every time, if I click "accept", I get the "Your tilt calibration appears to be invalid. Be sure to
do another calibration before yout next ride".
I normally do tilt cals before a ride, or check on my marked spot on the garage floor. My Newton seems pretty accurate
when riding and doing analyzis, and the "check calibration" only cause a slight change. I know I do everything right doing tilt cals, and get "GOOD TILT" in the ibike display. The "riding tilt" comes from my cal ride.

But just to sure I did a new ride, a 100% correct til calibration, but still get the same "invalid" error...

Why do I get this message?

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[Velocomp]

All is well.

In the Check Calibration feature, Isaac is trying to separate out two very similar tilt factors. It is extremely difficult to do this, and sometimes Isaac gets a bit confused.

I occasionally get this message, and I ignore it.