Hi all. Been using Zwift for a few yrs and usually buzz along in a 2.6 w/kg group but just today it has started running really slowly as in i’m pedalling as hard as I can but only getting up to 10/12mph and dropping straight out the back of the group. Any ideas?
Am using a Kickr Core with a Macbook Air.
It did perform an update after I opened the App if that could mean anything 
What sort of power does Zwift show when you’re pedalling hard?
Are you using Zwift Play? If so, check if your brake light is on for your avatar - it’s possible that the brakes are on even though you’re not pressing them.
Thanks for the reply. Yes i’m pedalling really hard trying to keep up with the group and showing 300+ watts but it’s just not responding and i’m dropping backwards. Yes I have got Zwift Play and I don’t think the brake could be on somehow but I will check again.
Maybe check that your weight hasn’t changed to something ridiculous just to be safe?
Also try turning the Brake Sensitivity down to the minimum (i.e. off) in Zwift Settings to see if that changes things. If it does then there’s something wrong with your Play controllers.