Accessibility ZOOM feature stopped working on iPhone

I was able to get ZOOM feature to work again without replacing battery!

Battery health still at 86%

Kept fooling around with settings on ZOOM feature and finally used the slider on screen in the app and was able to enlarge the type. The enlargement percentage in the system settings doesn't seem to affect the zoom size. Not sure why the system setting doesn't work now but more flexibility using the onscreen slider. Strange how the slider button defaults back to zero magnification but enlargement still works. Zoom activation is confusing but as long as it works everything A-OK. Reading small type so much easier. Screenshots below of slider at zero and enlarged. Weird that when enlarged the screenshot does not show larger image. Thanks

Thanks, Interesting. Guess you are saying that the battery may not be able to support the ZOOM feature? If I got a new battery installed, the ZOOM should be active again? ZOOM made using the phone so much easier. Actually wonder how many people using an iPhone activate the accessibility features?

Will have to try the battery replacement or upgrade to a 16 but wanted to wait a year. Appreciate you help

You are right, thanks. But what would cause the zoom feature to stop working in 17.7? Very odd!

Yes, original battery in hone. Battery health at 86 %

Probably doesn't matter but the phone was bought right before the 13s came out. ts four years old but only in use for 3 years.