Thank you all for the quick responses,
It seems that setting a variable before the patching being an issue.
OnSelect Button1:
Set(VarOrder, Amount_Input); // issue not able to navigate??
Patch(OrderTabel,ThisItem,{Amount: ThisItem.Amount + Add_Amount})
OnSelect Button2:
Navigate(Order_Form, ScreenTransition.Fade);
Seems to resolve the issue to Patch a add or distract and then able to navigate to the next form, so am going to work arround that some.
But at the moment I don't see why setting a variable makes the difference like this?
code:
Patch(OrderTabel,ThisItem,{Amount: ThisItem.Amount + Add_Amount}); Select(Button2)
Adding Select after the Patch only seems to activate Button2 without a click/tap.