209737 2020-03-30 07:01:02 -0700 Repaint issue in fixed header inside iframe 2020-03-30 07:01:02 -0700 1 1 1 Unclassified WebKit Scrolling Safari 13 iPhone / iPad iOS 13 NEW InRadar P2 Major --- 209486 1 fred.wang webkit-unassigned ap cathiechen dvoytenko fred.wang jridgewell simon.fraser webkit-bug-importer webkit-unassigned oldest_to_newest 1635482 0 fred.wang 2020-03-30 07:01:02 -0700 +++ This bug was initially created as a clone of Bug #209486 +++ Repro page: https://output.jsbin.com/wakuqok/quiet It's a simple page that overflows on x and y. When scrolled, it shows a very visible flicker. See screen recording: https://drive.google.com/file/d/1g7IQE25VOS2B5Bhg760_Qx7k0Bnrrqbp/view?usp=sharing ---- Note: Justin said "I had paint flashing enabled when recording, if you're referring to the red flashes."