This might not be a problem but does not seem quite right on my pc, I have game set to auto save replays and normally races I have mostly last 30-60 mins, upon taking the chequered flag the game freezes for up to 20 seconds while I assume the replay is saved. Now I was just doing some quick 3-5 lap races with 1 or 2 AI to try create some entries for the AI primer tool with adaptive ai, but it still takes 10-12 seconds to save the replay, I can understand a 1 hour race with 30-40 AI taking a while but not 5 minute races with 1-2 AI. The only thing I can think of is I moved my MyDocuments folder to a larger mechanical drive to save space on my SSD drive, would this make any difference and anyone else have long freezes after crossing S/F line?
Is your mechanical drive going into standby / sleep mode, due to inactivity? If so this is likely the reason.. waiting for it to wake up.
Steam is also installed on the same drive, its a 1TB drive just dedicated to everything steam related.
I might post a video of just how bad it is sometimes, it's not been this bad before and I have not changed any hardware recently, windows updates is maybe the culprit.