KeyboardTimePicker also changes the date when modifying the time using the keyboard

[tran-simon]

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

With the KeyboardTimePicker default value at "2021-06-10T12:00:00", changing the time using the keyboard to 12:30 also changes the date to today's date. Using the picker popup doesn't change the date

Expected Behavior 🤔

The behavior should be the same whether the users uses the keyboard or the popup picker

Steps to Reproduce 🕹

https://codesandbox.io/s/keyboardtimepicker-bug-zqeh4?file=/src/App.tsx

Steps:

1. Have a KeyboardTimePicker with the initial date value not in today's date
2. Change the time using the keyboard
3. The date changes

Tech	Version
@material-ui/core	v4.11.4
@material-ui/pickers	v.3.3.10
React	v.17.0.2

[tran-simon]

@oliviertassinari Why was this closed?

[oliviertassinari]

#2157

[tran-simon]

I see.

Since the bug is still present in Material-UI Alpha 5.0.0, I've opened the same issue there: mui/material-ui#26799