My best guess from looking carefully at your photos is that the part is coming partially away from the bed when the printing extends horizontally away from the base center, due to printing forces and leverage issues. You may not be able to see this taking place as the part is likely see-sawing back into place as the print head moves to the other side again. Once the width of the print returns closer to the center, the leverages in the printing forces reduce enough to allow the part so sit still again.
My theory is further supported by the base of the part having very low surface area for build plate adhesion — it’s a circle with a thin circumference.
If I am correct, adding a brim to your print (in the Others section) with a width of 5mm and a spacing of 0.1 or 0.2mm will help a great deal.
Additionally, if you have successfully printed this part six out of ten times, it suggests that the print sometimes comes partially unstuck, depending on your luck with it being only marginally able to “hang on.”
Either way, my experience tells me that such a print profile would absolutely need a brim to be reliable.
Hope that’s it! 