Dynamic Bookmark is not overwriting a selection.
An issue is that, when opening an application and a "default bookmark" is applied, the "Dynamic Bookmark" will not work.
Example
Use =Only({1}dimText=vText) instead of =dimText=vText (see the attached qvf sample).
QB-4049
There is some documentation related to an incompatibility of using a dynamic bookmark on fields with property "Always one selected value" activated ?
@pablolabbe ,
I just find some thread in community may be you already checked them