Issue-3529641: Fix fatal error when preRender processes string URLs.

Jaydev Bhattrequested to merge
issue/login_destination-3529641:3529641-call-to-a into 8.x-2.x
  • Add instanceof Url check before calling isRouted() method
  • Prevents "Call to a member function isRouted() on string" error
  • String URLs are now safely ignored in preRender callback
  • Maintains cache context functionality for actual Url objects

Fixes #3529641

Merge request reports