[2.1.4] MIDI ports rewriting themselves + MIDI failure

Windows version 2.1.4:
Suddenly my UMC MIDI input has been redirected to Virtual MIDI 1 and all of my layers that used UMC MIDI In now use Virtual MIDI 1 as their input. I have changed nothing. If I open the project in VL1 all the connections are correct.
More worryingly: During today’s practice session the MIDI input from the UMC stopped working in the middle of a song, nothing in the MIDI monitor but I could see data coming into the UMC (it has a midi activity light). Rebooting VL solved it but that’s not at all good.

Possibly related?

just checked the Mac version and the ports are ok

Am also seeing MIDI crosstalk from the UMC into Virtual MIDI 1

I have now reset all the ports to what they should be and the settings have been retained correctly. The crosstalk has also disappeared thankfully.