bug repeat: Ionic 4.10.0, page will flash when navigate back sometimes.

[netsesame2]

Bug Report
Ionic version:

[x] 4.10.0

I'v even post a bug to report the same isssue in ios: #19170 (comment), which is resolved in a dev patch.

Current behavior:
However, when update to latest 4.10.0, the same issue raised again. This time is in android.
Sometimes, page will flash when navigate back, not always.

I test it in android device and emulator, android 8 and 9.

Degrade @ionic/angular to 4.9.0-dev.201908231742.f2cfdf14.7.4, it will disappear.

Expected behavior:

Steps to reproduce:

Use navigation to push a page, then close it use back-button. sometimes a flash will appear.

Related code:
Use <ion-back-button></ion-back-button> to navigate back.
Other information:

I take a video to watch what happens. when slow down the video frame, I can see that when click back-button, the current page transit to dismiss, then suddenly appear half a second, then dismiss again, so in normal speed, we can see a flash.
Ionic info:

Ionic CLI : 5.4.1
Ionic Framework : @ionic/angular 4.10.0
@angular-devkit/build-angular : 0.803.5
@angular-devkit/schematics : 8.3.5
@angular/cli : 8.3.5
@ionic/angular-toolkit : 2.0.0

[liamdebeasi]

Thanks for the issue. Can you provide more details on how to reproduce this? I am using ion-back-button to navigate back from a page on an Android device, but I am unable to reproduce this issue.

[liamdebeasi]

Never mind, I was able to reproduce using a different device. I will investigate this and post more info here when I have it. Thanks!

[liamdebeasi]

Can you try this dev build and let me know if this fixes the issue for you? npm i @ionic/angular@4.11.0-dev.201910041827.7768ab2

[netsesame2]

Thanks, it is resovled in the latest patch.

[liamdebeasi]

Thanks! This issue has been fixed and will be available in the next release of Ionic.

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.