Quartararo collided with RNF Aprilia’s Oliveira on the opening lap of Sunday’s main race at Turn 2, which led to the red flags being shown.
The Yamaha rider was able to restart the race, while Oliveira was taken to the medical centre where he was diagnosed with a dislocated shoulder.
On his way to the grid for the restart, Quartararo was given a long lap penalty for the incident.
Speaking about the penalty, Quartararo said: “[I was] surprised and we don’t see any reason why.
“Maio [Meregalli, Yamaha boss] went to race direction to have an explanation, but no clear explanation was said.
“From our side, I think we don’t see anything strange and I think it’s clearly not a penalty. But, it’s in the past, and I made it twice.
“I mean, first I think they said that they are stressed in this situation, they are in a rush.
“But it’s difficult to say ‘you are penalised’ when you are not sure and after the race you are not fully agreed it’s a penalty.”
Quartararo had to serve the long lap penalty a second time as he strayed outside of the designated loop, which he says he didn’t realise he’d done. He was eventually classified 10th.
Source: Autosport