NRL referees boss Tony Archer has conceded his whistleblowers blundered in not referring the controversial Josh Morris no-call to the multimillion-dollar Bunker in the Bulldogs' season-ending loss to the Panthers on Sunday.

The Canterbury centre appeared to plant the ball on the tryline at a crucial stage in the second half of the Bulldogs' 28-12 loss to a red-hot Penrith at Allianz Stadium.

And the NSW flyer was irate after on-field officials Jared Maxwell and Chris James deemed him short of the line and ordered a play-the-ball. The Bulldogs were trailing by 10 points and trying to stem the Panthers' momentum.

Bulldogs coach Des Hasler was at pains to point out the referees were not at fault for his side's second half collapse, but questioned why the play wasn't at least afforded a review by the Bunker.