Greetings from Poly !
I would suggest to open a support case with Poly with all possible details and wiring diagram. Mentioned scenario will take more testing and troubleshooting.
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This forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer. Poly employee participation within this community is not mandatory and any post or FAQ article provided by myself is done either during my working hours or outside working hours, in my private time, and may be answered on weekends, bank holidays or personal holidays.