When the number of characters in the `TextBox` control exceeds a certain threshold, the content becomes hidden.

[ederquesado]

Describe the bug

When the number of characters entered into the TextBox control surpasses a specific threshold, the content within the control becomes hidden, making it impossible for the user to view the additional characters.

Steps to reproduce the bug

1. Open the WinUi3 Gallery in TextBox control.
2. Begin typing characters into the TextBox.
3. Continue typing until the character count exceeds the threshold (e.g., 16000 characters).

Expected behavior

The TextBox should display all entered characters

Screenshots

Before Threshold is Exceeded:

After Threshold is Exceeded:

Once the character count surpasses the threshold, the content within the TextBox becomes hidden, and the user can no longer see what they are typing or previously entered text.

NuGet package version

None

Windows version

No response

Additional context

No response

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Closed similar issues:

• TextBox control hides content when the number of characters in the control passes certain threshold (#2097), similarity score: 0.86

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[codendone]

I believe this is caused by a limitation in the underlying RichEdit control.