Sound mode doesn't work alone

On my old ringtone (Samsung J7 2016, Android 9) I had a profile with I turn ringer sound on / off when I was in the meeting.
Now I have Xiaomi Redmi Note 8 Pro, Android 10 with the same profile, but something is going wrong. It looks like vibrate mode and sound mode doesn't work alone. I checked it. The results are in PDF file. Sound mode and vibrate mode alone do not turn the sound on or off. I had to add both of them to my task. And it still depends on the order. For example, if I set vibrate mode first and then sound mode the ringer will not set silent.
Can anyone explain this?