Instinct 2 x solar tactical taking a long time to save activities

I find that my 2x is taking about 10 to 15 seconds to save activities, simple things like a 3 km walk will take this long so I don't think it is the nature of the activity as they all seem to take this long. Activities include pool swim, cardio, walk and bike. I notice that after about 5 second it will give a little buzz as if to say it is saved by the screen shows it still saving it for another five seconds or more.