Hoover Dynamix fast spin

[Zelee]

Weird issue with a 2 year old Hoover Dynamix washer.

Basically it runs through wash cycles fine but won’t fast spin- unless its tilted back slightly then put back level at which point in works perfectly for a couple of full cycles?

As the machine won’t enter a fast spin until it’s drained the machine clearly thinks it’s still pumping water out and tilting the machine makes the machine realise it’s drained.

Machine is pumping out fine, drain clear of obstruction filter ok and impeller at back of filter spinning freely.

Any thoughts gratefully received!!