I have a declarative expression on a property that is dependent upon another property.

The expression is set whenever inputs change regardless of the page

I perform an Obj-Open-By-Handle to open a work object and lock it.  I then set the property that the expression is dependent upon to a hard coded value.  Why does the expression not fire?

If instead I perform a page new on the work class and set the property the expression is dependent on the expression then fires.