Ender 3 V3 SE - Print head moves upwards at corners of first layer

Hey there!

I am experiencing some strange printing failures with my Ender 3 v3 SE.

The first layer of the perfectly flat model cannot be printed correctly, no matter what I try. The print had always lifts up towards the edges of the rectangular shapes of the models I try to print, as if trying to adjust to severe bed level issues. But the bed leveling went fine. I repeated it three times by now and everything is within the green range.

I can see the print head lift about 1mm above the print bed towards the edges of the model, which can also be felt by holding onto the z-axis rod. I reset the settings on the printer twice and leveled again. But I did not find the cause.

I also did try all three slicers I have - Cura, Creality Slicer and Orca Slicer, but all of them cause the same issues.

When moving the 4 models around on the build plate, the issue remains. It just moves to different spots, “following” the models. I have absolutely no idea what can cause this, especially since I use the very same slicer and settings on the second Ender 3 V3 SE that sits right next to this one.

Do you have any idea what can cause this weird behavior?

Thank you in advance for all your help!

Do you have a video of it doing this?