You are right ! I did a second try, with a different preset “0.08 High Quality”. It also failed.

The timelaps show the hotend hitting the model base. ( see this streamable ) It’s the first time it happens, I don’t know what to do to fix it 🤔

I use factory preset “0.2mm standard” for a 0.4mm hotend. The purge line looks normal to me. I had an other comment with bambustudio and freecad files.

For records, this is the model in Freecad and how it is sliced in BambuStudio