Well basically if you are looking at the bugs per Assignee view
you will see that in the Name field you need to add a formula to the form
Bugs\DisplayBasedOnUserAndProjects | BugsDisplayBasedOnUserAndProjects
@ReplaceSubstring(@Trim(@Middle(Query_String;"&name=";"&end"));"%20";" ")
to make it work. Please add the formula so it'll work. Cause each time you press on Go button, an %25 is added to the string.