This happened to me in career mode
Difficulty: 100
Stage: unsure---
Career Event : Week 4 - FIA WOrld Rally Championship - FIA WRC2 Championship - RALLYE MONTE-CARLO - EVENT 1 / 7 WEEK 2 / 2 - event length setting - LONG
I was having a good even back and forth with the AI's driving my WRC2 builder car, however at around the last/second last service stop and second last stage I had quit intending to continue later, when i returned the AI seemed to run fine for the second last stage but had huge stops at about 3/4 of first sector, then similar in second sector, landing at about 2 minutes behind by the end of the stage.