In 4.10 the Sketch widget does not work inside a form

[BrianJensen2]

Why does the Sketch widget not work inside a form in 4.10?

[JonathanUihlein]

Can you post a sample (jsbin or otherwise) showing what you mean? Thanks! 

[BrianJensen2]

JS Bin

[JonathanUihlein]

Comment from sample:
> my entire web app is wrapped in a form

I'm not sure I've ever seen that before, though I don't think form is intended to be used in that way. 

Is there a particular reason you are wrapping your entire app in a form?