I've found this interesting - not sure how true the "multiple of 1ms" thing is with Linux USB, but at least I think I have had better results using these. And it would explain the recommendation (which has been around for years) to use 3 periods when using a usb audio device in Linux. I assume it is no different when using Jack or Alsa directly.
https://wiki.linuxaudio.org/wiki/lis..._usb_interface