Bug 213741

Summary:	Rendering issue after clicking on back button
Product:	WebKit	Reporter:	Giorgi <giorgi.lagidze>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Major	CC:	ap, bfulgham, simon.fraser, thorton, webkit-bug-importer, zalan
Priority:	P2	Keywords:	InRadar
Version:	Safari 13
Hardware:	iPhone / iPad
OS:	iOS 12

Description Giorgi 2020-06-29 10:07:49 PDT

Hi Webkit Team...

I think my team and I are having some kind of rendering issue.

There's a settings screen where we show 8 links. When user clicks on each one of them, we navigate them to specified page. We also have a back button. The issue is that if they go to one of the links from these 8, and click back button, some links are disappeared and instead of them, there's just empty white background. Sometimes, link's text's 50% disappears and 50% still is still shown which makes it 100% rendering issue.

This only happens on IOS real device. not even on simulator.


Have you ever had this kind of thing/issue ?

Comment 1 Alexey Proskuryakov 2020-06-29 17:46:46 PDT

This does not sound like a common WebKit issue. Can you share steps to reproduce that we could try? Does it still happen with iOS 14 developer beta?

Comment 2 Simon Fraser (smfr) 2020-06-30 10:52:37 PDT

Please supply a link to a page we can use to reproduce the issue.

Comment 3 Giorgi 2020-06-30 11:57:30 PDT

Hi Simon and Alexey..

Is there any chance I can post the link of the example privately ? This is a big project and can't share all the details publicly. Maybe we can make the bug private and then I will make sure to show you how it behaves.


Let me know how we can achieve that.

Comment 4 Alexey Proskuryakov 2020-06-30 15:07:35 PDT

We don't typically use private bugs for this, but please feel free to e-mail me, and also indicate whether this is OK to share within Apple.

Comment 5 Alexey Proskuryakov 2020-07-05 11:32:37 PDT

With the steps that Giorgi provided, I can reproduce on recent build. Most of the time, it's whole links missing, which could be an application issue or a layout one, but sometimes, I do see partially rendered text that could be a missing tile.

Comment 6 Radar WebKit Bug Importer 2020-07-05 11:32:49 PDT

<rdar://problem/65109291>

Comment 7 Giorgi 2020-07-05 14:56:44 PDT

Thanks Alexey for the following up.

I think it's definitely the rendering issue since it doesn't happen on other links.. The structure and router links follow the EXACTLY the same logic.


I am most confused about the part that this only happens only for 3 router links as I told you about. Why not for other links ? 

It all makes me wonder that I have no idea if it's safari, or anything else.

Comment 8 Giorgi 2020-07-14 13:02:33 PDT

Hi Alexey, Any news on this ?