"There was a lack of enthusiasm; a lack of desperation which was the key disappointment for us," says Rennie of the defeat in Sydney. "We were out-passioned across the field and just didn't fire a shot in the first half.
"But even then, despite the fact we didn't play well, I still thought we should have won the game. We were good enough to win not playing as well as we can. What was really frustrating was that our defence, which has been a big part of our game, was not as intense as it needed to be. We slipped off tackles and we gave away a lot of yardage when we did make tackles."
With 30 points already in the bank and no other side breaking free from the pack in terms of table position, the Chiefs remain in the vanguard. But only if they draw a line under the last two performances and re-discover their precise execution.
They are unlikely to be able to use Richard Kahui to do that - he has a hamstring strain that isn't expected to heal in time for the Sharks clash on Saturday night. Andrew Horrell will definitely not be available after suffering a high ankle strain that could be season-ending, while Fritz Lee has a broken finger that could be troublesome.
Last year, questions didn't persist about the Chiefs; their results provided emphatic proof they were a team that could sustain their excellence. When they did lose their first game of the campaign, they bounced back with nine consecutive victories before losing to the Reds. Their response to that defeat in Brisbane was to return to Hamilton and beat the Bulls with a crushingly effective, brutal performance.
There was tangible evidence that they learned and adapted from week-to-week. That ability needs to be displayed again.