Losing WiFi when second display is connected

Since last night, my WiFi has been disconnecting and cannot connect at all if i connect a second display. Restart or shutdown completely then start doesn’t change anything. Unplugging the second display brings back WiFi.

My WiFi card is bcm94360cs2 which I believe is from an iMac.

Any ideas on how to diagnose? Thanks

submitted by /u/mrjayviper
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