I’m trying to handle navigation to a ContentPage from another ContentPage

MainView : PushModalAsync -> BrowseDatabasePage : PushModalAsync -> MimicPage : PopModalAsync

which then gives me this exception

System.ArgumentException:
 'Ambiguous routes matched for:
   //IMPL_LocalLAPTOP/IMPL_LocalLAPTOP/LocalLAPTOP/D_FAULT_BrowseDatabasePage16
 matches found:
   //IMPL_LocalLAPTOP/IMPL_LocalLAPTOP/LocalLAPTOP/D_FAULT_BrowseDatabasePage16,
   //IMPL_LocalLAPTOP/IMPL_LocalLAPTOP/LocalLAPTOP/D_FAULT_BrowseDatabasePage16 Arg_ParamName_Name'

I did add some logging so I could see where in the navigation change I was and had been

Navigating
Source  : Push
Current : //LocalLAPTOP
Target  : D_FAULT_BrowseDatabasePage16
Navigated
Source   : Push
Current  : //LocalLAPTOP/D_FAULT_BrowseDatabasePage16
Previous : //LocalLAPTOP
Navigating
Source  : Push
Current : //LocalLAPTOP/D_FAULT_BrowseDatabasePage16
Target  : D_FAULT_MimicPage17
Navigated
Source   : Push
Current  : //LocalLAPTOP/D_FAULT_BrowseDatabasePage16/D_FAULT_MimicPage17
Previous : //LocalLAPTOP/D_FAULT_BrowseDatabasePage16

BrowseDatabasePage has no route registered explicitly in code and I can’t explain where the route with Arg_ParamName_Name has come from.