I’ve been using Zwift for around 1 month with my Cycle Ops Magnus trainer. I’ve run into a reoccurring issue where I’ll be riding various courses and the resistance will suddenly increase to the point where I can barely pedal (even standing up). In other words, the tension becomes so high its like riding in quicksand. It’s fairly impossible to continue. It’s doesn’t appear related to the natural changes due to the course. It doesn’t happen every ride but occurs regularly. Can you help me diagnose the issue.