Why is my webpage blinking when I scroll up and down?

My webpages are blinking up and down when I scroll up and down on a site, also any videos I play do the same thing?  Any ideas?

Hi xillain, 
Thanks for contributing to the Apple Support Communities.
It sounds like you're noticing unusual behavior with your iPhone screen. If the screen seems to shake or jitter when you scroll up and down, I recommend these steps:
Try to restart your device. If you can't restart, reset your device.
If restarting or resetting doesn’t fix the issue, restore your device.
If you still see the issue after you restore, contact Apple Support.
From:
Get help with the screen on your iPhone, iPad, or iPod touch - Apple Support
Sincerely,
Jeremy 

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