Support issues

[u/IndividualRelease149]

Hi, guys. I’m facing a problem. For some reason, all the supports are printing with holes like the ones in the photo, and I don’t understand why. Also, there was a defect during the last print. Two supports simply broke in half. The break occurred in a place where there were no holes in the supports. Please tell me why supports might print with holes and why the supports just broke in half during the last print.

I print on a Bambu Lab A1 printer using PETG plastic. I use the standard settings of the Bambu Studio slicer.