Scroll issue with fixed position in iOS 12

[vukhacbiet]

Bug Report

Problem

My App have a fixed div (a popup), it overlay body (and this div in #app) . When I show popup, I can not "overscroll" to top or bottom and if I tried to pull down from top, my page can not scroll at least 1s.

First, I think it was an issue of my code, so I make a test cordova app to verify, and it happen the same.

It always happen in iOS 12, and doesn't in iOS 13

Information

Video I tested in simulator iPhone 6 - 12.4 (build in Xcode 11.5) https://vimeo.com/426500132

Command or Code

My test app git:

https://github.com/vukhacbiet/test-cordova

Environment, Platform, Device

Cordova iOS 6.0.0 Xcode 11.5

Tested in real iPhone 6 - iOS 12.4.3 and iPhone 6 simulator - 12.4

Checklist

• [x] I searched for existing GitHub issues
• [x] I updated all Cordova tooling to most recent version
• [x] I included all the necessary information above

[NiklasMerz]

If this happens only on iOS 12 this sounds more like a WebKit bug by Apple and not a Cordova bug. I would advise your users to update.

[vukhacbiet]

We know that some older device such as iPhone 6, iOS 12 is the last version, so I hope find a temporary solution

[NiklasMerz]

Maybe you are lucky and find JavaScript code to work around that. Feel free to post here for others.

Closing this since this is no Cordova issue.