Bed leveling or nozzle problem? Help!

When the nozzle goes forward is too high, and when it goes back is too low? What causes this? I don’t think it’s a bed leveling problem, maybe my nozzle tip is not flat? But it only happens around I1J2 and I2J2 points, which indicates it should be a bed problem.
I’m confused :cry:

Tried another heat bed, it’s still there.

There is a thread about a rising bed, have a look if the bed moves in the z direction while traveling:

I think you could give it a little less offset (like -0.1mm), hope this helps!

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Thanks! After reading that post I mailed support. Hope it will fix.