Bug! "Default duration for new appointments and meetings"

Hello Everyone!

I have noticed a weird behavior in outlook when I tried changing the default time for outlook meetings. I wanted to set the default time as 45 minutes.

It worked when I tried creating meeting from "new items>meeting":

When I tried creating meeting from Calendar>new meeting, The changed time doesn't appear:

Same is the behavior when we double click on calendar to create meeting.

Is this a Bug?