How can I update a component after the page is loaded?

I have a Label component on a detail page of a CollectionView where on Android it renders correctly, showing its content, however on IOS, it does not show the content, only the second time it is rendered.

The text type of this label is HTML

I put the code and prints in a GitHub gist for better organization.

https://gist.github.com/zehguilherme/333636f81ee217914f51497790b6b31b

JarvanZhang 23,951 Reputation points

2021-05-25T01:37:55.38+00:00

however on IOS, it does not show the content, only the second time it is rendered

Hi, @José Guilherme Paro Monteiro Tomaine Is there any difference between the two rendering? Please post the related code or share a basic demo to reproduce the issue, it'll help to get the cause to the problem.
José Guilherme Paro Monteiro Tomaine 1 Reputation point

2021-05-25T11:57:31.867+00:00

I updated the body of the question with the code and prints for better understanding.
JarvanZhang 23,951 Reputation points

2021-05-26T07:03:00.843+00:00

It seems you test a Shell application. The code are all in the shared project which should not have the different result between iOS and Android. I tested a basic demo about the function, it works as expected on iOS. Try to create a new Flyout template project and test to check if it could work on iOS on your side. If it works, please refer to the new project code to get the difference.
José Guilherme Paro Monteiro Tomaine 1 Reputation point

2021-05-26T13:02:51.23+00:00

This, I am using the Shell and the code is in the shared project.
Understand. in another forum I asked this same question and a guy said it could be something related to the ContentPage lifecycle. Then I thought of a strategy to update the UI of the component (Label) as soon as the page was loaded (through the OnAppearing method). I don't know if there is something in that direction that can end up working. If not, I'm going to create another basic project today just with this detail page issue.

Another piece of information: this project in question was created from the base project made available by Microsoft (as far as I can remember). It was created by my boss.
JarvanZhang 23,951 Reputation points

2021-05-27T02:43:03.64+00:00

Another piece of information: this project in question was created from the base project made available by Microsoft

The base project works fine on my side. What's the version of VS on your pc? And what's the version of Xamarin.Forms in the project? Try to update both to lastest stable version, then clean and rebuild the project.
José Guilherme Paro Monteiro Tomaine 1 Reputation point

2021-05-27T11:46:23.3+00:00

Current versions:

Available updates:

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Ok, I am going to update Xamarin Forms to the latest version, I had not updated it before for fear of being incompatible with something.
José Guilherme Paro Monteiro Tomaine 1 Reputation point

2021-05-27T11:57:56.463+00:00

I updated all the dependencies but the problem is still related to the label "Message".
JarvanZhang 23,951 Reputation points

2021-05-28T05:40:10.213+00:00

Please update the VS to the lastest stable version and then create a new 'Flyout' xamarin.form project for test. If it still doesn't work, please share a basic demo to the github or ondrive and share the link to reproduce the issue.

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How can I update a component after the page is loaded?

Current versions:

Available updates: