Print job gets paused waiting for filament

My RatOS 2 V-Core3 har suddenly started with this annoying habit of going though all the motions when starting a print, including homing, tilt, mesh prime blob and then it parks itself at X250 Y500 and prompts me to load filament despite me already having done so. If I oblige and then resume the job it proceeds normally.

It did not do this before. I may very well have changed something while working with the printer without realising it would affect this.

I typically select the PETG heater profile and then "Load filament" with a suitable temperature.

Any ideas what I am doing wrong?