WhatsApp Business is extremely laggy on iPhone 12 — scrolling freezes and messages delayed

iPhone 12 was released in September 2020, 5 years ago. Have you had the battery replaced in your phone since you got it? Batteries which are failing can certainly cause all sorts of issues. Open Settings > Battery > Battery Health - if it is near, at or below 80%, the battery needs to be replaced at your closest Apple Store Genius Bar.

iPhone Battery Replacement - Apple Support

Ctrl-Z_Ctrl-Y wrote:

Nope, the issue still persists. Before this, everything was perfectly fine, but after updating to iOS 26, all these problems suddenly started happening. Very weird, it only happened after the update.

WhatsApp is an App from Meta. They are some of the buggiest apps out there. In the Authors post, I suggested they check their battery health because they commented people they know with newer phones weren't having such an issue. WhatsApp on average has to update their apps a couple times a week, sometimes more, because as they fix one thing, they break something else. Apple doesn't own WhatsApp, so if this is happening to you and you have a newer phone with a healthy battery, you need to let WhatsApp know about your issues. Anyone who is having this issue needs to contact WhatsApp. Apple can't fix anything wrong with WhatsApp at all.

"WhatsApp Business is extremely laggy on iPhone 12 — scrolling freezes and messages delayed: [...]This is really frustrating because my workplace relies heavily on WhatsApp Business for daily operations, and we manage around 20 WhatsApp Business accounts, so this lag and delay issue is affecting our customer communication seriously. My colleagues using newer iPhones don’t seem to have this issue, so it appears to be specific to the iPhone 12. Kindly let me know if there is any fix or workaround for this. Thank you."

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Managing WhatsApp an Lagging:

iPhones aren't intended for multitasking, and being such an old device, you might want to consider upgrade to a newer iPhone. Nonetheless, I suggest you manage this on a Desktop, as it would be more user-friendly doing so.

Contact WhatsApp:

Go Here: https://www.whatsapp.com/contact/

Have you been able to solve the problem ? I have the same problem. It started 3 days ago. I've tried using a VPN, but it doesn't help. The app is very slow. However, regular WhatsApp works perfectly.