Cannot use my PC as Hands-Free when making call from "Phone link" app

[Windows Server]

My PC is connected to my phone via Bluetooth, and when I stard a call phone from my PC through "Phone link" app, I cannot speak using my PC headset, only through my phone. Actually during call on my phone I can choose my PC as a headset, but immediatly after this my phone resetting to default "Phone" instead of my PC

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