Bug 187320

Summary:	sticky positioned element is twitching within iframe
Product:	WebKit	Reporter:	Kvet <mpcteam.kvet>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	bfulgham, simon.fraser, zalan
Priority:	P2
Version:	Safari 11
Hardware:	iPhone / iPad
OS:	iOS 11
URL:	https://jsfiddle.net/19vjm4q7/7/

Description Kvet 2018-07-04 03:00:47 PDT

Steps to reproduce:
1. Open link: https://jsfiddle.net/19vjm4q7/7/
2. Scroll the table

Current behaviour:
Top row is twitching while scrolling.

Expected behaviour:
Top row should not twitch while scrolling.