Why is my iPhone 16 Pro Max flickering while using certain apps?

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Expressing or conveying visual experiences effectively through these forums may be challenging. The underlying visual issue on your iPhone cannot be accurately diagnosed online. Factors such as your iPhone's specific settings, visual defects, and potential hardware problems cannot be assessed through this method. For more personalized and in-depth assistance, I recommend securing a Genius Bar Reservation and exploring the various support options provided by Apple.

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When you encounter issues with your Apple devices, the Genius Bar at Apple Retail Stores is the go-to place for expert assistance. The Genius Bar is staffed by knowledgeable Apple employees, often referred to as "Geniuses," who can diagnose and resolve a wide range of hardware and software-related problems. To ensure personalized attention and a convenient visit, Apple provides the option to schedule a Genius Bar Reservation.

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Same issue here. I think that’s the application own issue. It is really annoying and we can only wait them to fix it. I used both WhatsApp and WhatsApp Business on my iPhone 16 plus. Only WhatsApp has that issue and I think it caused by the new theme function as they made the type bar became transparent.