My USB project https://github.com/rgrr/yapicoprobe with CDC-ACM and MSC has problems on startup with TinyUSB 0.17.0: * MSC hangs BIOS startup * USB devices are not detected after sleep/reboot until replugged TinyUSB 0.18.0 solves all this. PS: I have to admit that I have not tracked it down to a specific commit in TinyUSB