[bug]: Promise returned by Controller.start is not resolved consistently

[yifeiyin]

Which react-spring target are you using?

• @react-spring/web
• @react-spring/three
• @react-spring/native
• @react-spring/konva
• @react-spring/zdog

What version of react-spring are you using?

9.7.3

What's Wrong?

await controller.start({ ... }) is not being resolved consistently. And the behaviour the consistently dependent on the animated value.

To Reproduce

0. Open the codesandbox console
1. click add 3 times
2. click on the top left element to trigger removal
3. click on the top element to trigger removal
4. notice that the Finished awaiting never gets printed
5. Go to line 74. Comment line 74. Uncomment line 76
6. Reload page. Repeat 1-4. Notice that the finished awaiting gets printed

Expected Behaviour

Promise is always resolved immediately after animation completes.

Link to repo

https://codesandbox.io/s/react-spring-reproduce-s7jvwv