Hi, I’ve played around with the deviceorientation controls example and found that it is very shaky (jittering) on my iPhone 11 Pro. I’m wondering if this is a know issue and maybe even only an iPhone issue and if anyone knows what can be done to make it a bit more stable.
A screencapture of the issue can be see here:
I’m unable to reproduce the shaking on a Pixel smartphone. Unfortunately, I can’t test with an iPhone. However, it would be good to know if other iPhone users could confirm this issue. Here is the link to the example:
https://threejs.org/examples/misc_controls_deviceorientation
I tested on an iPhone 6S and I can see no shakiness
Black screen on iPhone X iOS 13 using Safari fully up to date—works on Chrome though and no jitter.
Hm, Galaxy S7 works fine. My iPhone 11 Pro also runs iOS 13. I wonder if we could find another iPhone 11 Pro to test.
It looks the same in Chrom on my 11 Pro
Using an iPhone XS with iOS 13, I get a couple noticeable bumps/recalibration every few seconds after starting the experience—then it settles down.
I don’t get anything like the shaking and stuttering in the video above, but I do get a sort of brittle jitter generally when moving the phone quickly.
Anecdotally, I feel I’ve been noticing a slight jitter on iOS for almost a year? I know that when using a phone as a “magic window” for advertising experiences, we have been applying some smoothing to avoid this (at minor loss of responsiveness).
Hi everyone,
Thank for all the support. I restarted my iPhone and now all is good again. It all boils down to.
‘Have you tried turning it off and on again’ 
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Glad to hear that! In any event if iOS related problems occur again, it’s best to report such issues directly to Apple or Webkit.
https://www.apple.com/feedback/safari.html
https://bugs.webkit.org/
DeviceOrientationControls only processes raw event data without any post-processing.
I just observed the same or similar issue in iOS 14 so have requested attention at both of the suggested links (reported to Safari Feedback and opened request at Webkit https://bugs.webkit.org/show_bug.cgi?id=217043 ), thanks.
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