You can't decrease hours when it's the time you would switch from daylight saving time to standard time.
I have a stackblitz that reproduces the problem, it's set to the 28th March 2021 at 2am, if you try to decrease from 2am to 1am it doesn't do anything.
https://stackblitz.com/edit/angular-ivy-vn5z7e
You can't decrease hours when it's the time you would switch from daylight saving time to standard time. I have a stackblitz that reproduces the problem, it's set to the 28th March 2021 at 2am, if you try to decrease from 2am to 1am it doesn't do anything. https://stackblitz.com/edit/angular-ivy-vn5z7e