Are you submitting a bug report or a feature request?

Bug report

What is the current behavior?

Example repo: https://codesandbox.io/s/dreamy-goodall-cvy9c?file=/index.js

Seems that, if handleSubmit returns Promis<void> without causing an async tick, submission gets stuck in submitting: true state.

What is the expected behavior?

Shouldn't be stuck in submitting; should briefly be submitting: true then switch back to false

Sandbox Link

https://codesandbox.io/s/dreamy-goodall-cvy9c?file=/index.js

What's your environment?

Latest final-form/rff

Other information

Hey Erik! 👋 I'll try to dig in at root cause. I have some free time :)