I noticed bytes_invalid increasing over time bytes_invalid=95 -> bytes_invalid=133.
Hopefully, it should be fixed in the current master: stm32: usbotg block next bulk_in if buffer not empty by nefelim4ag · Pull Request #7238 · Klipper3d/klipper · GitHub
v0.13.0-593-g2f05309d5
-Timofey