I have googled this problem extensively, and it would appear that many people have the same issue.
I have posted the same question in several Android support forums, but it appears no-one has a solution. I have also posed this question in the Google Support forum, who again had no solution but who suggested I report the bug to Samsung, as the issue lies with them. I tend to disagree with this as I understand this is happening with Android phones other than Samsung, but I have posed the question to Samsung anyway, and am awaiting a reply and hopefully solution.
I would suggest anyone else with this problem reports it to their phone manufacturer too, as it may help speed up a solution if it becomes apparent that many people are experiencing the same problem.
I will post any reply/solution I get from Samsung here, so as to assist others with this.