Trainer is not recording speed and distance, but is recording cadence

My Tacx NEO 2T, which is connected to my Edge 530, for months was working great, however more recently it has stopped recording speed and distance, but is recording cadence. You can see below that power is working fine, and so is cadence, but records no speed. I've tried forgetting the trainer as a speed/cadence sensor and refinding it, making sure the firmware was up to date, restarting the trainer, but no luck. Any ideas?