With the pump off, move the suction side valve so the SPA side (left on your picture) is open (180 deg from where it is in picture) and the return valve is set so the SPA side is open (point it towards the Pool side). Then restart the pump and see if the flow is isolated to the spa.
The water features are tougher to help with as you have many return lines on the Pool side. I need a close up picture of those to help.