My game in general was running very slow and sometimes freezing completely whenever it was communicating with the servers earlier in the week, haven't been on for the past couple of days though.
Often seems to get like this a few days before an update for me. I had the same problem in the 2-3 days leading up to patch 1.14. I suspect maybe PD are preparing their servers for an update during this week, it would make sense given it will be GT6's one year anniverary too. That's just guess work on my part.
Come on course creator!