It's nearly always an excuse for Checo but this time a visor tear off that was discarded from 'old fox' ALO on the exact moment before PER overtakes him and RBR have claimed that tear off lodged into a critical aero inlet preventing PER proceeding to challenge those in front of him. Errant plastic supermarket bags blowing about tracks and these visor tear offs that can cause problems is something the FIA hasn't addressed yet, ie 'FIA for road safety'.
https://www.gpfans.com/en/f1-news/10...age-australia/