Hi Peter I had the exact same issue and tried everything (including re celebrating ) but nothing worked. I did notice a slight squeak when turning trainer on and when zwift gradient changed. I took off plastic cover on light sensor side and blew out any dust that may have been inside unit with my compressor and re greased threaded shaft with food grade grease (very thin grease). Problem solved I have been using it every day for weeks now without any problem. Hopefully your problem is similar.
Thanks Max. Great to hear your trainer works without problems now. Due to other issues Elite replaced my Direto. I have no issues with the new one.