I had an issue with the same drive: it did record 18 tracks, but skipped portions of my recording (when it got ‘too busy’)
I would suggest trying it back on the mixing board (home/qu-drive/multitrack) and see if you can play it back from there… if not, the recording did not work properly. If it does, then… wait for the next suggestion from someone else because I don’t use PT.
In my case, I changed the drive for a Samsung SSD and it works beautifully now (I import into Audacity on my Mac)