Mount disconnects

I am having a problem lately where my mount disconnects out of nowhere during a session. All programs loose connectivity with the mount (Avalon StarGO SW, PHD2 and SGP), but the mount is still operational and tracking normally. I can see from the logs that there are always issues with the ZWO EFW just before the mount disconnects.

Here’s a link to two log files from last night

I had the problem an hour into my session, so I exited SGP and started again. I had the problem again around 3:30AM.

I have a ZWO ASI1600MM Pro connected to a powered hub, which also connects my mount. the ASI1600MM Hub has the EFW and 224MC as guider connected to it.

Any ideas? This has been happening almost every time I image