iPhone 15 Pro Max not charging and buggy with user's reliable 3rd-party power adapter after ios 26.2.1

“iPhone 15 Pro Max not charging and buggy with user's reliable 3rd-party power adapter after ios 26.2.1: […]running ios 26.2.1 suddenly doesn’t not charge & becomes buggy when connected to user’s usual 3rd party 20w power adapter despite owning it since getting the iphone 13 pro max and using Apple’s proprietary iphone usb c cable that came with the iphone 15[…]”

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Troubleshooting iPhone Charge:

Visit the following links for tips on troubleshooting this...

I. Go Apple-for-Apple, when it Comes to Charging:

Many take for granted the price-saving of using third-party cables and chargers on a device. But, over-the-years, it can make a difference. So, go brand-for-brand (Apple-only devices) when it comes to charging an Apple device.

II. Try what is on this Link: If your iPhone, iPad, or iPod touch won't Turn on or is Frozen - Apple Support

III. View the Battery Health:

Apple recommends you get a new battery, once the Battery Health reaches 80% or lower. When the Battery Health is 80% or lower, it is time for a new battery.

1. Go To: Settings
2. Tap: Battery
3. Tap: Battery Health
4. View: [the percentage]
5. Is it 80% or less?  If so, it is time for a new battery.

IV. Perform a Restart:

Try Force Restarting your iPhone. Save any information that need be. Then perform the restart.

Go Here: Force Restart iPhone - Apple Support

V. A Few Apple Support Sites that May Help:

• iPhone Battery and Performance - Apple Support

• Charge and Monitor the iPhone Battery - Apple Support

• About the Battery Usage on your iPhone - Apple Support

• If your iPhone or iPod touch won't Charge -Apple Support

• About Optimized Battery Charging on your iPhone - Apple Support

• If you see "Your iPhone Battery may Need to be Serviced" - Apple Support

“iPhone 15 Pro Max not charging and buggy with user's reliable 3rd-party power adapter after ios 26.2.1:”

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Update to iOS 26.3:

iOS 26.3 has been released roughy half a day ago. So, perform the update, seeing if charging is then fixed.

IMPORTANT:

Back Up First: Before installing the update, be certain to back up your iPhone prior to installing the update. That way, you will have something to restore your iPhone from should anything go wrong with the update. Create a new backup, after the update has competed.

HOW TO UPDATE;

Other than directly through the iPhone itself, you can do so using a computer, and though Cellular. Use my User Tips:

• Computer: Update your iPhone Using a Computer - User Tip
• Cellular: Use an iPhone 12 or later, that is using 5G, in order to update over Cellular - User Tip

So, what happens if you use a different charger?

“excuse my response, but i actually don't need a bot answer, i know all about those troubleshooting steps, the power brick works with the rest of Apple's type c devices (airpods & e.t.c) but stopped charging the iphone after 26.2.1 Plus going to 26.3 isn't the answer for it is untested for this bug, whether it is going to fix it or going to make things worse, it is a risk that is not willed to be taken at the moment.”

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There’s no need to be rude. What would I know of your experience? And I’ll leave it at that.

Superfluous post. (deleted)