I am implementing deep linking inside our custom power apps. where inside the App >> OnStart, we define to read the Id parameter, as follow:-

then on the Form >> we define the parameter as the Item for the form, as follow:-

but on the field when we try to get the value of a text field (or any other data type), using the Default property as follow:-

nothing will be shown.. so can anyone advice ?
Also i tried to add a test label >> and set its Text property to be equal to ThisItem.'Office / Cubicle #' .. i will get the value of the related field inside the variable.. so is the issue with the Default property?