Strange issue

I printed the kite line mount for go pro. I was in the other room and just checking out from time to time until I find out the next:

This is the object I printed:

Everything went OK:

After hour and a half:

Any idea what happens? And why?
I printed with 40% fillament, 190deg, 0,1mm layer.

The small surfaces didn’t stick to the bed.
Check if the nozzle-bed distance is not bigger than 0.2 mm.
Use a brim that will help the small squares sticking to the bed.

I assumed that the problem is sticking of small squares. I will try again with smaller nozzle-bed distance.

Thanks for your help!

Try this surface, works with small pieces also.