I don't think I've changed my mind.
I've said that at that particular distance from base and phase of flight, they were probably reducing speed in order to complete the pre landing checks. I have also said that they could very possibly have slowed down on the way back in order to check out the previous job.
It's not a change of mind, just 2 possibilities as to how they could have been at a low speed when something happened down the back end.