Is hair loss 5 months post hair transplant normal?

I've had my HT in July 2022 (5mo post op). After a month all of them fell out and it all started growing back. When I study I tend to sit with my head above the books all days and I noticed that some of the transplanted hair sometimes, not in large numbers but still fall out on the books. They are not native hair because of different thickness. I have noticeably thicker hair on my donor area thus the ones falling from the front are transplanted hair. Is this normal?