I have an update on this issue.
I returned my camera with about one day left of the warranty.
According to the paperwork that came back with the camera the top plate and eye piece were replaced. The camera appeared to be working fine, the shutter release seemed to work as it should.
Within a few days the problem of multiple activations started again. One press would fir the shutter two or three times. Not every time but certainly every day and several times a day. Its very irritating and frustrating.
I contacted Fuji who have asked me to send the camera back to them, I have found Fuji very helpful.
I shall keep you updated. Incidentally a non warranty repair was shown as £220 I believe. I have had a non warranty repair of a lens recently and Fuji cannot be faulted. I am very implressed with their service.
I follow a professional photographer and Youtuber who was raving about the Xpro3 but he had a similar issue with the shutter release being hesitant. He got rid of the camera in the end because of the problem.