Bamford drew another blank in defeat to Brighton yesterday.
Bamford has found the going far tougher against three-man central defences.
Bielsa makes a point of never disclosing valuable technical information but he said Bamford did not have a problem.
"I don't link the fact he doesn't have opportunities to the fact the opponent plays with three centre backs," he said.
"[You] are making references to the striker who has had the most shots in the Premier League this season."