bug: iOS 17.5, animation flicker

[moerphie]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Ionic Framework Version

v8.x

Current Behavior

Elements flicker when opening and closing the modal.
It only occurs irregularly. In Chroma, Safari and iOS simulator.

iOS.17-5.mov

Chrome.v126.mov

Expected Behavior

No flicker expected.

Steps to Reproduce

1. Clone this repo: https://github.com/moerphie/ionic-flicker-bug
2. yarn install && yarn run build
3. Launch iOS Simulator and open/dismiss modal

Code Reproduction URL

https://github.com/moerphie/ionic-flicker-bug

Ionic Info

Ionic:

Ionic CLI : 7.2.0 (/usr/local/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/vue 8.2.2

Capacitor:

Capacitor CLI : 6.1.0
@capacitor/android : not installed
@capacitor/core : 6.1.0
@capacitor/ios : 6.1.0

Utility:

cordova-res : not installed globally
native-run : 2.0.1

System:

NodeJS : v20.15.0 (/usr/local/bin/node)
npm : 10.7.0
OS : macOS 14.5

Additional Information

ionic capacitor run ios
❯ iPhone 15 (simulator) (817E61FD-2527-4064-B811-4AEA8A399AC4) 

Follow up of a closed issue from last year #28467

[maximilien0405]

I'm having the exact same issue 😬
Seems like apparently it wasn't fixed in the 17.5 IOS update..

Any news on if someone is working on it ? Also where is the problem coming from ? Ionic or WebKit ?

[moerphie]

I have noticed that when you drag the modal to close it, the background elements don't flicker. Only when you tap on the backdrop.

If that helps: If you are using the ion-action-sheet, this problem does not happen when you tap on the backdrop.

[brodenbrett]

I have the same issue running iOS 17.5 on an iPhone 15 Pro Max emulator in XCode

[gunsha]

having the same issue with react

[maximilien0405]

Hello ! Does anyone have any idea what's the issue here? Would be nice to have at least an answer 😁
It's a pretty bad visual bug that makes any app with modals feel "not native"..

@OS-giulianasilva I see that you have been assigned and then un-assigned from this.. do you or someone on the Ionic team have an idea of the issue ? Thanks !

[joshuah459]

Currently seeing this same behavior. For us it is also fine if the modal is dragged down, but not if the backdrop is tapped.

[JulienLecoq]

@joshuah459 I have the exact same behaviour. Just the backdrop being tapped generates the flickering for us.

[moerphie]

@JulienLecoq @joshuah459
The bug has existed for well over a year and a half.
I have no hope that it will be fixed.

[artpol]

I'm experiencing this issue when opening and closing the keyboard and having a modal window open.
Serious visual bug. Does anyone else have a solution?

[JulienLecoq]

@moerphie It feels like the team is not actively working on issues lately. It might just be an impression though :/
I hope this can be resolved quickly, I have my app in production and this flickering really annoys me.

[JulienLecoq]

I'm experiencing this issue when opening and closing the keyboard and having a modal window open. Serious visual bug. Does anyone else have a solution?

Unfortunately I don't.