Problem with slash in Custom Actions

Hello,

I could need some help while using the CustomActions. Actually I just want the CustomAction to open a URL.
In my example I want the CustomAction to just open the URL (google.de/maps) in the entity.DisplayLabel ("Title")






When clicking on the CustomAction, SMAX keeps changing the URL and replaces the slash ("/") with the hexadecimal code "&/#x2F".
 



Anybody can help me to prevent SMAX to replace the backslash?


Best Regards
Tran