It's not that long ago Boxall was a PL No.1, so not that much of a surprise, if he's on decent machinery.
I wouldn't read too much into this result. Rye were probably strengthened by Bunyan's absence (still don't understand how a team can sign somebody and use R/R in official competitions, knowing he'd be missing) and riders are still 'blowing the cobwebs away.' It's just that Rye, apparently, blew them away quicker than the Panthers.
Still a long way to go until September/October!