Symptoms

Forms Not Loading
 

Diagnoses

Currently experiencing an issue whereby forms are loading/not loading intermittently.
Spinners are displayed, but form does not load. By refreshing the page, the form loads.
No errors logged in events. Jscript error present referencing _runtimeControllerdefinition is not defined . Only happens for Anonymously enabled Forms
 

Resolution

Cold-Fix provided . Error was caused by random 302 redirects to Windows STS by the UserResources.ashx and Image.ashx