On the 11W site the question was posed, does Dwayne Haskins have a tell? The OP seems to think so as do many contributors. I have to say, looking back at some other highlights it would appear so. In fact he has two complimentary tells, he literally tells the defense whether he'll be passing or handing off for a run.
After watching video provided by the OP and other videos on YT, I'm inclined to agree. Of course it won't help on an RPO, since that play starts as a run play, but his passing tell is near 100%. It will be interesting to see if that has been corrected for their game with Maryland. On the other hand, habits are hard to break, this is especially true when under pressure.