ERG mode wattage target can get stuck during session

Trainer: Tacx Vortex
Device with Zwift App: Notebook with Windows 10
ANT + or BLE: Ant+
ERG mode or SIM: ERG

I have the same issue starting today, this is finding the power meter and it sticks at 135w, even at the discovery stage, however on my BikeErg just ride screen it’s not showing any watts being delivered.

Trainer: Concept 2 BikeErg
Windows 10 PC with Ant+ dongle

This setup has been working perfectly for the last few weeks and even as recently as Thursday when I was doing the foundation workout for the FTP Builder plan (I came on to do the last foundation workout today and it was after the update that this started failing).