TextBlock Stops Updating

Hello,

I have 3x TextBlocks which update every few seconds based on a timer. I have added an additional empty page/form on c# and a button to navigate to the page/form and another to return back to the main page.

When I return back to the main page, the TextBlocks are no long updating even though I confirmed the timer is running and the methods being triggered by the timer are also functioning.

My code to update the TextBlock looks like this:

        private string setProbeOne
        {
            set { var task = this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () => { txtTemp.Text = value; }); }
        }

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I confirmed through debugging that the timer is working and that the value is being passed to the property so I'm confused as to why the TextBlock no longer updates when I return to the page.

Any help is appreciated, thanks in advance.