MS
1%er
It might make more sense that instead of being literally lost, he was just never at the top of anybody's list. He might have been second or third whenever people compared him to another prospect, and nobody felt strongly enough to push for him.
That's totally believable that he was continually near the top of teams' draft lists but not eye-catching enough that any scout pushed hard enough for him.
The notion that 'teams thought he was already drafted so they didn't take him' makes zero sense to me. These teams have computerized lists in front of everyone at the draft table which would be removing guys when they were taken and I don't see how, if you rated him anywhere reasonably highly on your list, you wouldn't be seeing him there when you were coming up to draft in rounds 5-6-7.