The cause of the AI getting randomly slow

Summarize your bug So, when doing an event in career mode everything is normal at first and the AI works fine. Although even at 100% the AI is too easy, definitely. But as soon as you exit the event/exit the game at all and resume at a later date, the AI difficulty bugs out. The first stage after entering the game again is still fine, but thereafter every stage for the remainder of the event the AI ist super slow and you easily win a stage by a margin of 3 minutes even if you yourself drive slow.
How often does the bug occur? Every time (100%)
Steps: How can we find the bug ourselves? Start an event, preferably in career mode. Complete at least one stage. Exit the game. Then resume the game and the event. The next stage will seem fine but thereafter the AI is suddenly super slow. If you complete an event in one session everything is fine.
What happens when the bug occurs? The AI opponents are super slow.
What do you expect to see? The AI being consistently fast. And also the 100% difficulty being more difficult in general.