Are you talking about a real Windows pc keyboard? If not you probably skiped one step for entering the time. After entering the number you have to click the "ok" at the keyboard and after that the ok from the Time Dialog Box. I think you Skip the "enter" confirmation at the keyboard.
Samsung Galaxy Tab S7 FE Android 12
Samsung Note Pro 12.2 LineageOS 14.1
Huawei Media Pad M3 lite Android 7
Samsung Note Pro 12.2 LineageOS 14.1
Huawei Media Pad M3 lite Android 7