TimePicker scrolls only after selection on mobile

[eyalyoli]

• I have searched the issues of this repository and believe that this is not a duplicate.

Reproduction link

Steps to reproduce

1. Press the time picker input
2. The dropdown of choosing time components (hours/minutes/seconds) is shown
3. Try to scroll the time component without selecting/touching an initial value

What is expected?

To be able to scroll the time components on the initial state after popover is shown

What is actually happening?

Can't scroll the time components until you select a random option from each time component

Environment	Info
antd	4.16.7
React	17.0.2
System	Android v10
Browser	Google chrome mobile v92.0.4515.166

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It seems like a problem with the initial focus on the component. This issue makes the users think that the time selection is limited to the initial opened list (because it can't scroll) - this is misleading.
On a lot of systems, there are no visible scroll handles so you can't know what is scrollable and what is not.

[loiclaudet]

I ended with using https://www.npmjs.com/package/rc-time-picker which looks like a copy of the TimePicker, but without the scroll issue.