Symptoms

SmartForms are not rendering properly and appear to be corrupted.
Specifically, there is a blank area that appears above the form header and below the form. These areas are not part of the form design. The view controls appear to have been resized and have been moved to the left side of the screen. The design was for the view controls to be located in the center of the screen. The form controls (buttons) have also been moved to the left. I have checked various forms throughout our environment and it appears that they are all experiencing this same issue. This includes out of the box Appit auto-generated forms as well as those that have been customized.
 

Diagnoses

Issue was determined to be with "bad" server side cache that causes the client side to download "corrupted" bundle files. This consequently caused the styling on the SmartForms to be off or not to render correctly.
 

Resolution

This can be fixed one of two ways:

- Performing an IIS reset.
- Clear out the SmartForms(Runtime/Design) server side cache by hitting the following URL?s:
.../Runtime/CacheControl.ashx?m=Clear
.../Designer/CacheControl.ashx?m=Clear

TFS logged with the intent to continue to investigate/try to figure out why this occurs sometimes after maintenance upgrade on the K2 server.