In the final stages of the Suzuka race, Gasly was asked to let Ocon by as the pair were set to finish ninth and 10th.
Gasly angrily protested on the radio but eventually relented by letting his team-mate by at the very last possible moment, in the third sector of the final lap.
Gasly was asked to let Ocon by to return the favour from earlier in the race, when Gasly passed Ocon but then failed to overtake Aston Martin's Fernando Alonso ahead of the pair, thereby having to revert the positions.
But a puzzled Gasly said that while Ocon undercutting him was a scenario he was aware of, the late reversal was never discussed in the pre-race strategy briefings.
"It wasn't discussed before the race," Gasly said. "It was clear with the strategy they had planned that at some point Esteban would undercut me, but my pace was faster and I would have to pass him back.
"I overtook him anyway on the race track because I had fresher tyres.
"It was never said that we would need to invert the positions again because I started ahead and I was always in front.
"As a team 10th and ninth or ninth and 10th is the same, but it was definitely not something I expected. And it's not something I really understand as well as I was the leading car, so we'll talk about it.
Source: Autosport