[Answer]-Issue with views on button click

I’m not sure what you mean by “just the upload selection panel as Intended”.

Firstly, I see a problem by you returning an empty form if the submitted form is invalid, you should rather return the existing form and show the errors.

Your form, upon clicking the upload button will send a POST request to your server and your view generates a whole new HTML page as a response. HTTP is stateless, meaning that whatever your browser showed before is basically no longer of relevance. So naturally you will see a new page.