What is causing SSH to stop working over wired connection when I plug in a wireless usb card?

I have a Banana Pi running some custom Arch distribution by Ryad. I plugged in a cheap wifi dongle with the Ralink RT5370N chipset. Under /etc/systemd/network: 10-eth0.network [Match] Name=eth0 [Network] DHCP=yes RouteMetric=10 20-wlan0.network [Match] Name=wlan0 [Network] DHCP=yes RouteMetric=20 Whenever I plug in the wireless usb card, I have trouble "SSHing" into the thing. Existing secure shell sessions continue to work normally. What would cause this? networkctl (before plugging in) IDX LINK TYPE OPERATIONAL SETUP 1 lo loopback carrier unmanaged 2 eth0 ether routable pending 3 tunl0 tunnel off unmanaged 3 links listed. networkctl (after plugging in–takes a long time to respond) IDX LINK TYPE OPERATIONAL SETUP 1 lo loopback carrier pending 2 eth0 ether routable pending 3 tunl0 tunnel off pending 4 wlan0 wlan off configuring 4 links listed. wireless_tools is installed. lsmod yields the following possibly relevant results: rt5370sta 673082 0 rt2800usb 13632 0 rt2800lib 48613 1 rt2800usb rt2x00usb 11127 1 rt2800usb rt2x00lib 42474 3 rt2x00usb,rt2800lib,rt2800usb mac80211 247524 3 rt2x00lib,rt2x00usb,rt2800lib