Print issue with larger model

Hi,

I’m currently printing this model: Rotating spacious Desktop Organizer by Stamatis Sarlis - MakerWorld
and I’m experiencing some printing issue after just a few layers of the print.

It seems the first 10 or so layers contract somewhat, creating a rim around the model.
After that, everything seems to print as expected.



In the slicer, no rim is shown:

The print was not stopped at any point, it’s a single-color print.
I used Sunlu PLA beige, in Bambu Studio I used the “Generic PLA” filament profile.

Any idea why this happens?
Maybe uneven heating of the bed?