It was the same scenario when I photographed the event. especially wedding events, I tend to lose focus. even if I'm in a Spot focus. I hope it will correct its firmware because its getting annoying and I'm a bit frustrated
I don't know why this was happening but for information purposes I have solved the problem.
By opening each of the 7 + custom settings and using the Q button I was able to save the MF Assist setting to "Peak" for each one. The setting now remains permanent.
Thanks to everybody who tried to assist.
Bernard