iMac air streaming to Android phone instead of HomePod

I have HomePod receiving music from iMac for a day(first day after syncing HomePod and my iPad). Now(it is the second day), the music is being played on my android phone instead of HomePod and it is not playing on iMac built-in speakers too. I tried changing SOUNDS as well as HANDOFF config on System Preference as per suggestions on the net