Wattage with Computrainer much lower than with Stages

I am experiencing a large power discrepancy between the Stages bike I use at the gym and the Computrainer i am using with Zwift. My 20 minute ftp with Stages is 260w. Using my CT on Zwift I have to work hard to stay above 200w. My calibration for the CT is done before each ride and generally between 2.5 and 2.6. Any suggestions?

Hey Steve, can you send us a support conversation with your log files for your Computrainer rides? We’ll be able to see what exactly was going on behind the scenes.

Support Conversation: https://support.zwift.com/hc/en-us/requests/new
How to find log files: https://support.zwift.com/en_us/how-do-i-find-my-log-files-(cycling)-SyTW0JZSX

Steve: Did you get the wattage question answered. If so what was the outcome?

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I am having the same issue. 01/12/21. Did they find anything out?