Fast-progress decrease

[FLYERok]

Hello!
I'm using fast-progress with function to set timeout for decrease:
decrease = () => {
const percent = this.state.percentage - 1;
if (percent < 0) {
clearTimeout(this.tm);
return;
}
this.setState({ percentage: percent });
this.tm = setTimeout(this.decrease, 30);
}

All is ok. But, when «percent == 0» I see a short delay indicator. After some time it disappears. There is no smoothness. https://codesandbox.io/s/3x6p0w149m

Can you help me, please?

I’m sorry for my English. Thank you very much!

[afc163]

Fixed in #80