When a particular team member publishes/schedules an Instagram post from the Zoho Social web, the post notification will be sent to the Zoho Social mobile app of that particular member only.
For instance; If Dave published an Instagram post, the member needs to sign in to Zoho Social mobile application with his/her login credentials, to access the post notification from the 'Notifications' (Instagram publishing) section & proceed with the Instagram publishing.
However, when another team member - "John" publishes an Instagram post, the post notification will be sent to the mobile application (logged-in as John) & other members won't receive this notification on their mobile device.
If you require receiving this post notification (for the post published by John), then you need to sign in to your mobile application using John's login credentials & proceed with publishing on Instagram.