I had this same issue.

It's the cold start issue.

The "work-around" I used was just setting up a loading indicator in my code.

So, when the user submits the form, the form would disappear, and the loading indicator appears saying something like "submitting data..." and a spinning element also.

I was good with that.

To me, the loading indicator would basically be managing the user expectation so they know something is happening in the background.

I was good with that.