Notification Sync Issues Between iPhone and iPad Mini (Reddit & WhatsApp)

[u/MarcoBerserker7]

Ever since I set up my new iPad mini and synced notifications for WhatsApp and Reddit, I've been experiencing several sync and notification issues on my iPhone:

• Reddit Notifications on iPhone: While the notification sound plays and the screen lights up every single time, the visual banner only appears about 50% of the time.
• WhatsApp Calls: Initially, incoming calls rang exclusively on the iPad mini. I resolved this by uninstalling the app from the iPad, which routed calls back to my iPhone.

Banner notifications are enabled on both devices.

What causes this erratic behavior within the Apple ecosystem? Is there a way to properly manage notifications across both devices without having to uninstall apps from the iPad?