bug: Collapsible Large Titles Flicker

[seanaguinaga]

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

v7.x

Current Behavior

With version 7, the collapsed title flashes upon navigation

Does not happen with version 6

Screen.Recording.2023-03-29.at.5.01.40.PM.mov

Please see video ^

Expected Behavior

Would not flash, as in version 6

Steps to Reproduce

upgrade to version 7

see flash on collapsed title

Code Reproduction URL

No response

Ionic Info

Ionic:

   Ionic CLI : 6.20.8

Utility:

   cordova-res : not installed globally
   native-run  : 1.7.2

System:

   NodeJS : v18.15.0
   npm    : 9.5.0
   OS     : macOS

Additional Information

No response

[ionitron-bot]

Thanks for the issue! This issue has been labeled as needs reproduction. This label is added to issues that need a code reproduction.

Please reproduce this issue in an Ionic starter application and provide a way for us to access it (GitHub repo, StackBlitz, etc). Without a reliable code reproduction, it is unlikely we will be able to resolve the issue, leading to it being closed.

If you have already provided a code snippet and are seeing this message, it is likely that the code snippet was not enough for our team to reproduce the issue.

For a guide on how to create a good reproduction, see our Contributing Guide.

[seanaguinaga]

hey @liamdebeasi how do I give you access to a private monorepo?

[liamdebeasi]

I recommend reproducing this in an Ionic starter application and providing a link to the repo. This way you can have a minimal reproduction without providing any secret/private code.

[seanaguinaga]

https://github.com/seanaguinaga/large-title-repro

A little different - duration is longer - but I'm certain it's the same cause

Thank you for all that you do Liam (and team) - Ionic is amazing (as you know)

[seanaguinaga]

Also happens here on mlynch's repo on first render

https://github.com/mlynch/nextjs-tailwind-ionic-capacitor-starter

[milanharia]

@liamdebeasi @amandaejohnston I have managed to recreate this with an ionic starter project, it is clearly visible when you make the content a different colour other than white.

This is the code for my page:

<IonPage>
      <IonHeader>
        <IonToolbar color="primary">
          <IonTitle>Tab 1</IonTitle>
        </IonToolbar>
      </IonHeader>
      <IonContent fullscreen color="primary">
        <IonHeader collapse="condense">
          <IonToolbar color="primary">
            <IonTitle size="large">Tab 1</IonTitle>
          </IonToolbar>
        </IonHeader>
      </IonContent>
    </IonPage>

Simulator.Screen.Recording.-.iPhone.14.-.2023-04-11.at.10.49.27.mp4

[thetaPC]

@seanaguinaga please provide a video clip of the flickering that you are experiencing on your repo, large-title-repro. This would allow us to track the bug easier since I have not been able to replicate it on your repo.

[thetaPC]

@milanharia please provide the reproduction that you mention. I wasn't able to replicate it using the React Tabs starter and this is a tricky bug.