Direto Zwift Training/ERG

[abgrasso1@mac.com]

My direto trainer is having real difficulties with Zwift training or workout modes. I am using an iPad pro with ios 12.0.1 and connecting with bluetooth. When just riding, everything works great. However, when I do a training and then go in ERG mode, there are times when the resistance all of a sudden becomes so difficult, I can barely turn the pedals. It can happen at a relatively low wattage like SST or during a high intensity sprint. It is very frustrating, and makes the training modes almost un-useable for me. Any help or ideas?