Were you able to get this addressed? I am having the same issue with my Teraflex Delta Brakes. It is at the shop now and they bled everything and are going for another test drive. But the more I am reading, seems there may be something else going on.
Mine does this from time to time. But I noticed the other day when it happened, I went to the phone, and unlocked it. (Screen lock) the both USB ports started working normally again. So when it happens again, I’ll try that and confirm. It could be I was just lucky.