Sorry for OT in thread but I have brain fade lately.
There is a fix for tight pits and better AI behaviour, doh.
I had reset a lot of stuff using hardlinks and GME's and my player files were not setup properly.
Been using normal low fuel loads for shorter races, for ages seems. doh.
If you force AI to use full tanks they don't crash in pit-lane and lessen chance of rear ending other cars.
It's because they are so flighty at 120% with low fuel, full tanks grips them up.
20 litres they leaving black lines at pit hairpin .. full tanks not a mark on road.
Went back to normal full tanks after that screenshot and never had a single incident or yellow flag.
You can still increase fuel usage to have pit stops in shorter races
Just did 10 lap Brianza full tanks @ 7x fuel 5x tyres
AI pitted lap 6-7-8
I went long ( lap 9 ) just made it, short filled and took no tyres

...just a test I would normally take tyres.
That is real problem, you can't dictate what AI do with them and their situation is different ( physics)