Twilio Programmable Messaging - WhatsApp Push Notifications and Badges Not Sending

We use Twilio Programmable Messaging to send WhatsApp business messages. Sending messages to iOS, does not deliver push notifications or badges reliably. We have assessed on multiple phones, reset both WhatsApp and iOS notifications to factory settings, deleted and reinstalled WhatsApp multiple times and still not receiving messages reliably. This is a major reliability issue for customers because they cannot rely on whether or not they will be notified of important updates by WhatsApp business accounts via Twilio. What exactly are the specifications for WhatsApp sending or not sending push notifications for WhatsApp business accounts via Twilio Programmable Messaging? Is there a character limit, a rate limit, a limit on messages without a reply outside of the 24 hour response window? Essentially, delivering messages to a WhatsApp number from via the Twilio business messaging API does not reliably send push notifications or badges for new messages on the iOS WhatsApp application