The port that I believe the OP is talking about is the port that has two receptacles combined. A USP on top and an a HDMI on bottom.
Both communicate to the radio.
On my 2017 ACE. That USB port will charge. But, apps from the phone can interfere with the radio.
I don't remember exactly what I did. I think turning off Bluetooth solved the problem when charging my phone from that port ceased interference with the radio.
The best option for charging something, cell phone, etc. is one of the cigarette lighter adapters that has two USB charge ports. Plug that into the port just beside and away you go.
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2017 Thor ACE 27.2
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