I have in the past and also today recorded other shows on TSN2 and also have the same issue so it's not just the F1 feed. My brother-in-law records a lot from TSN2 and they have the issue too, although seemingly more severe than myself. I had a call from SD tech tonight to state that they will investigate the issue He is personally recording shows from TSN2 to see what happens on his own setup and he said that another customer had also complained about the same problem. He said if they find an problem with the TSN2 feed, they will send a ticket to the broadcast side to see if it can be fixed. He seemed to think that the feed was being over-compressed but I'm not 100% sure that is the case. Either way, he said he would be in touch within the next week to update.