Whitespaces inside an inline object are not processed while loading editor data

[niegowski]

📝 Provide detailed reproduction steps (if any)

1. Add the following to some editor:

editor.model.schema.register( 'button', {
	allowWhere: '$text',
	isInline: true,
	allowChildren: [ '$text' ]
} );

editor.conversion.elementToElement( {
	model: 'button',
	view: 'button'
} );

2. Load editor with:

<p>
	This is
	<button>
		a button
	</button>
	inside a paragraph.
</p>

✔️ Expected result

Model:

❌ Actual result

Model:

❓ Possible solution

📃 Other details

• Browser: …
• OS: …
• First affected CKEditor version: …
• Installed CKEditor plugins: …

---

If you'd like to see this fixed sooner, add a 👍 reaction to this post.