Thank you for the confirmation. I understand that you’re running iOS 26.5 and the issue regarding the twitching is happening across all applications. This bug is a known ProMotion (120Hz) frame pacing issue caused by optimization attempts that has been widely reported throughout the iOS 26 cycle and was not addressed in iOS 26.5.
Potential solutions to try, in order:
Settings > Battery > Low Power Mode (this throttles performance and directly impacts ProMotion behavior)
Settings > Accessibility > Motion > Reduce Motion (reduces animation complexity, which can eliminate the visible jitter)
- Disable Limit Frame Rate:
Settings > Accessibility > Motion > Limit Frame Rate (make sure this is off; as enabling it will cap the display at 60Hz)
- Hard restart your device:
Press and release Volume Up, press and release Volume Down, then hold the Side Button until the Apple logo appears (this is different than restarting via control center)
- Remove heavy widgets from your Home Screen:
Widget-heavy pages have been specifically reported to trigger stuttering during swipes and cause a noticeable decrease in performance across the operating system
If none of these help, this is most likely a software issue with how iOS 26.x handles ProMotion scaling across third-party applications. You can report it directly to Apple at https://feedbackassistant.apple.com. The more reports Apple receives, the higher priority it’ll be to get fixed.