Thanks, can you locate the source sense resistor and send a scope shot of its voltage?
Mind you , maybe the sense reisstor is inside the chip, which is not going to help us.
iF YOU SCOPE IT, USE A BIT OF MODIFIED COAX AND NOT A DANLGING-GND-LEAD scope probe (sorry again about caps).
If no sense resistor, then you could always add a sense resistor in immediately upstream of the boost inductor and scope that ......as long as you power the xt6001 thru an isol transformer.
If you can look at either the inductor current waveshape, or fet current waveshape, then that offers great help.
If you send me F(sw), THEN ILL SEND YOU A SIM of it. in free ltspice.....that can help to investigate.