Bug 207689

Summary: Elements disappear on https://smartslider3.com/full-screen-divi-slider/
Product: WebKit Reporter: Roland Soos <roland>
Component: ScrollingAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: bfulgham, koivisto, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: Safari 13   
Hardware: iPhone / iPad   
OS: iOS 13   
See Also: https://bugs.webkit.org/show_bug.cgi?id=207630
https://bugs.webkit.org/show_bug.cgi?id=204605
Attachments:
Description Flags
Screen record none

Description Roland Soos 2020-02-13 04:59:37 PST 
Created attachment 390631 [details]
Screen record

Steps to reproduce:
1. Open https://smartslider3.com/full-screen-divi-slider/
2. Wait a few seconds

What should happen?
The text an images should be visible on the screen

What went wrong?
The elements are becoming non visible. If you scroll on the page the element become visible again.
Comment 1 Roland Soos 2020-02-13 06:35:43 PST 
Another example:
#1 Open in Safari on iPhone/iPad: https://smartslider3.com/wordpress-carousel-post-slider/
#2 Place your finger at the right side of the image and drag it to the left and release.
#3 After the slide switching the bullets under them become invisible or partly visible.
Comment 2 Radar WebKit Bug Importer 2020-02-13 11:35:46 PST 
<rdar://problem/59431306>
Comment 3 Simon Fraser (smfr) 2020-02-13 15:53:50 PST 
The first example reproduces on macOS too. I can't get the bullets to disappear on macOS.
Comment 4 Simon Fraser (smfr) 2020-02-13 15:58:49 PST 
I think this is also about the scrolling tree.
Comment 5 Roland Soos 2020-02-13 23:07:49 PST 
Applies to both example:

Able to reproduce:
iPad version 13.2.3
iPhone 13.3.1

Not able to reproduce:
10.15.3
Release 100 (Safari 13.2, WebKit 15610.1.2.1)

For the other scroll issue I reported there was scrollLeft or scrollTop set all the time. I just checked and at these examples all scrollLeft and scrollTop are 0.

n2("*").each(function(){
  if(this.scrollTop > 0 || this.scrollLeft > 0){
    console.log(this)
  }
})
Comment 6 Simon Fraser (smfr) 2020-03-24 17:24:27 PDT 
(In reply to Roland Soos from comment #1)
> Another example:
> #1 Open in Safari on iPhone/iPad:
> https://smartslider3.com/wordpress-carousel-post-slider/
> #2 Place your finger at the right side of the image and drag it to the left
> and release.
> #3 After the slide switching the bullets under them become invisible or
> partly visible.

I spawned this into bug 209526 because I suspect it's different.
Comment 7 Simon Fraser (smfr) 2020-03-24 17:31:42 PDT 
This seems like a repaint bug too.
Comment 8 Simon Fraser (smfr) 2020-03-24 19:00:04 PDT Comment hidden (obsolete)
Comment 9 Simon Fraser (smfr) 2020-03-24 20:31:34 PDT 
This doesn't reproduce with backing sharing disabled, so it's likely a dup of bug 204605.
Comment 10 Simon Fraser (smfr) 2020-03-24 22:08:41 PDT 
Confirmed.

*** This bug has been marked as a duplicate of bug 204605 ***