Iphone 13 Promax Safari PDF Lag

Thanks for reaching out, H1090.

It sounds like you're noticing some performance issues when viewing PDF files. We can help.

Go ahead and see if you can Restart your iPhone and see any improvement.

Keep us posted.

Same problem iPhone 13 pro Max, only with 60 fps is working properly, but they should fix it, I bought a pot model to have a 120hz screen not 60.

lets send a feedback to https://www.apple.com/feedback/iphone/ maybe they will notice

please apple, do something

There is no solution to this problem. But you can drop the screen refreshment ratio

settings >accessibility >motion >limit frame rate to 60

I know, nobody wants to use a 120 Hz phone in 60 hz

other way to do this; please switch to low power mode (again 60hz)

may Apple will solve this problem in a new version of iOS.

I have had the same issue since upgrading to iPhone 13 Pro, both on iOS 15 and 15.1. While scrolling through a PDF on Safari, the frame rate drops to an incredibly low amount (less than 30fps). I have not experienced this with any other type of content, suggesting that Apple’s new adaptive refresh rate places the priority for PDF files too low.

Hey guys - I think I’ve worked out the issue. I called Apple support, got put through to a senior technician and he did a screen share with me. And guess what - the issue wasn’t there! So we ended the call and I was really confused. I tried a PDF again after the call and the issue was back. So I thought it would be a good idea to do a screen recording of the issue but guess what, it was gone again!!! So, the only thing I can think of is there’s an issue with the variable refresh rate of the screens on the iPhone 13s. I’m willing to bet that when screen sharing and screen recording the frame rate is locked at 30 FPS, which means the issue doesn’t happen. As soon as it tries to use 120 (or variable), it’s causing the problem. Could some of you see if the problem stops if you try a screen recording? Will confirm that this is likely the problem :)

I’m 99.99% sure it’s the variable refresh rate of the screen that’s the problem here. As a workaround, I’ve worked out you can go to Settings - Accessibility - Motion and turn the Limit Frame Rate setting on. This will stop the issue. Pretty bad though that you need to limit the frame rate.

I have called Apple back, given them all the details (including a video of the issue and system diagnostics from the phone) to a senior technician who is raising this with the engineering team and will let me know what they say.

However the workaround I mentioned above does work.

I confirm that. Just did a screen recording now on my iPhone 13 Pro and the issue is instantly gone!

So this is something wrong with the adaptive refresh rate.

If you put the phone in save charge mode, it also solves the issue.

I also have the same issue. iPhone 13 Pro. All PDFs viewed in browsers are clunky when scrolling. Saving to Files and viewing natively on the phone work fine.

Anybody had an update from their Apple support tickets?

Merry Xmas 🎄

Yeah same issue here. No iOS Update fixed this so far. Restarting doesn‘t help at all. The only way to use Pdf files in safari properly is by limiting the framerate, turning on power saving mode or screenrecording. When promotion is activated it is very laggy to use, doesn‘t recognize all touches and gestures and won‘t reach even 60 Hertz

Same Problem here. Reducing Refreshrate to 60Hz fixed it nearly.

Apple Store couldn’t help, just said to reset iPhone an Setup as new device (not done because of many authentication Apps to be new installed)

iPhone 13 Pro Max 256GB

Hi all

I see a lot of people have issues with this particular issue on the iphone 13 pros.

I am writing in to say I also have this issue with the iPhone 13 pro IOS 15.2.

On my phone pdf scrolling is very smooth on mail, in safari the scrolling is maybe 20fps max and stutters pretty bad. Bad enough that I can really only read while it is not moving. Interestingly this problem does not appear in a screen recording but while I was recording it it would look bad.

I hope that Apple is able to take a look at this issue soon as I have experienced more issues with this phone than I have previously with iPhones.

I have the same issue.

iphone 13 pro max with iOS 15.1.1

In Safari all PDFs are so slow when scrolling. Even a 2 pages document with only text.

why is nobody from Apple responding here? So many people with the same problem.

Please please please fix the PDF issue. I spend majority of my time scrolling scientific research papers and documents. Got the iPhone 13 pro max for the high performance and smooth almost buttery experience but this is anything but smooth. I am potentially considering returning this very expensive device. Come on guys, this one should be a no brainer! It is soooo important for some people!

cheers!

Thank you dear for acknowledging the problem. I shall wait for the fix in the next update.

keep up the fantastic work guys - you guys made a very nice phone! And the OS is not bad. I recently switched from Android and while it does require some getting used to - it is not all that bad - you guys have come a long way.

keep it up!

So far the best fix is to just download the file by clicking the share button and opening it in Files app. Everything will stay smooth and you won’t have to go to settings to turn ProMotion off and back on again.

But still, this isn’t ideal, I hope Apple will address this issue with the next iOS update. I think it might have something to do with WebKit apps in general, not just Safari (I’m guessing it also doesn’t appear in Apple Mail and Files app because it’s a modifiable PDF, but correct me if I’m wrong).