Fader Wing Freeze up on ION Console.

I am currently doing a convention using our ion console and 2x20 fader wing. i have the first 30 faders mapped as submasters which work fine.  I have the last 10 faders mapped as playback faders.  every so often the playback faders freeze up. the forward and back buttons stop working and i can not even load the cuelist back into the fader, it seems the entire fader is frozen.  when one of the playback faders freezes all of them freeze.  the only way i have found to work around this is to load them into the main playback fader on the ion itself and then run the playlist from there. after about 10 minutes it will let me reload them into the fader wing and will work for a while but will then freeze up again.  

I have updated to 1.4.3 in hope that it would have been a bug fix that was corrected, but the issue still exists.

Any suggestions?

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