Hotpoint Aqualtis AQ113D697

I have a hotpoint Aqualtis AQ113D607(E) washing machine, purchased in 2012. The manufacture date is August 2011.

Fault: It stops 30% of the time with 1 minute remaining on the wash timer. If left unattended it can sit on 1 minute forever, (longest we left it was overnight), continuing to turn the clothes over.

Workaround: The workaround is to pause the wash, turn the dial to rinse, and resume the wash. The rinse takes 45 minutes but completes every time.

The machine stopped working completely a few months ago, which was due to a split in the ribbon cable from the door controls. While waiting for a replacement door to arrive, I purchased a second hand machine, manufacture date October 2011. The second machine also exhibited the 1 minute issue on 30-40% of its washes. After replacing the door, wish a used complete door, the first machine worked, but continues to have the 1 minute fault.

There is no fault code displayed.

Hotpoint claims to have no known issues with these machines. I have found a few people on forums with the fault, but no solutions. It was suggested a heating element; Hotpoint service (Facebook) suggests this is unlikely to cause this issue. Would it actually get as far as 1 minute remaining if the heating element was at fault? Or would it report an error?

Can anyone help?