SIM mode on Elite Drivo not working

I have recently bought an Elite Drivo trainer. Since I bought it specifically for zwifting, the first few sessions on the trainer were made on the zwift app. Everything was working incredibly well! 

After a while, i went back to some Sufferfest training too, and I set my trainer resistance to a set level (7) inside the Sufferfest app. Since that time, the SIM mode won’t work anymore once i ride on zwift (outside of trainings in zwift). 

I have tried uninstalling everything and reinstalling on Zwift, but nothing seems to fix my problem. 

Any ideas what my problems is here ? How could i fix that ?