Describe the bug

Quote block's Write Quote... placeholder is not visible on Android

To Reproduce

1. Add Quote block
2. The Write Quote... placeholder on top of Write Citation... placeholder doesn't appear on Android

Expected behavior

There should be a Write Quote... placeholder on top of Write Citation... placeholder

Screenshots

Android	iOS

Smartphone (please complete the following information):

• Device: Nexus 5X API 29 x86 emulator
• OS: Android 10.0
• Version: 1.24.0

Additional context

Realised this while implementing Pullquote block: #1920
WordPress/gutenberg#20265

Quote block uses RichText to implement the text inputs and issue seems to be with that component. For the Quote block the only difference between the quote and citation input fields is that the quote input gets the multiline prop passed in: https://github.com/WordPress/gutenberg/blob/master/packages/block-library/src/quote/edit.js#L45

When multiline prop is removed it works as expected.