Hotpoint WD61 Filling Problem

My WD61 has stopped filling with water via the main soap chamber and uses the much smaller chamber to the left. This is a recent thing as it's always filled from the main one before. This is stopping the soap from getting in to the wash.

I've had the top off and can see no blockages in any of the supply pipes.

Everything else, turning, spinning, drying, etc seems fine.

Any suggestions very gratefully received.

thats the hot water valve, check water flow, if not new valve