Label LineHeight causes bad layout under iOS

[philipag]

Description

The given sample shows 2 identical labels except that label "Test2" has LineHeight=2.

Under Android, LineHeight only affects multi-line spacing (it correctly has no effect if there is only a single line of text).
Under iOS, LineHeight changes layout even when there is only a single line.

Regardless of which one if correct, the behavior should be the same under Android and iOS. It seems to me that the Android behavior is the correct one.

Steps to Reproduce

1. Run the repro sample on Android and IOS. Android produces the correct result:
   
   iOS produces the wrong result:
   

layoutbug12.zip

Version with bug

Release Candidate 3 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 15

Did you find any workaround?

no

Relevant log output

No response

[v-longmin]

Verified repro on iOS 15.4, not repro on Android 12.0 with VS 17.3.0 Preview 1.0 [32427.505.main]. Repro project:
layoutbug12.zip

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[XamlTest]

Verified this on Visual Studio Enterprise 17.6.0 Preview 6.0. Repro on iOS 16.4, but does not repro on Android 13 with below Project: 7222.zip

iOS:

Android: