[Bug] Android: applying a bold heading strips bold from the previous line

[lukasz-patalan]

Describe the bug

On Android, applying a bold heading (htmlStyle.h1.bold: true) to an empty line removes bold from the previous line. Turning a new empty line into a heading unexpectedly strips the bold formatting from the line above it.

To Reproduce

Steps to reproduce the behavior (Android):

1. Render EnrichedTextInput with htmlStyle={{ h1: { bold: true }, h2: { bold: true } }}.
2. Type some text and make it bold - this is line A.
3. Press Enter to move to a new empty line.
4. Select the H1 (or H2)
5. See error: line A loses its bold, while the new line correctly becomes a heading.

Expected behavior

Applying a heading on the new/empty line should only affect previous line- it must keep its bold formatting. Removing a conflicting inline style should be scoped to the requested range ([start, end]) and preserve the parts of the span that fall outside it.

Video

Untitled.mp4

Device:

• Device: Galaxy A70 (reproduced on physical device)
• OS: Android 11
• Version: react-native-enriched-html 1.0.0

Additional context

• Platform-specific: happens on Android only. iOS is unaffected - toggling a heading there never strips bold from adjacent lines.
• Only reproduces when the heading is configured as bold (htmlStyle.h1.bold: true / h2.bold: true).