Emojis doesn't work on iOS in Safari

Describe the bug Emojis doesn't work on iOS in Safari, just some garbled code. Only happens when typing on iPhone, copied emojis works fine.

To Reproduce Steps to reproduce the behavior:

1. Build a web app using easymde.
2. Type in a few emojis.
3. See error, some garbled code.

Expected behavior Emojis.

Screenshots

** Version information **

• OS: iOS 15.4 (Chinese Simplified)
• Browser: Safri
• EasyMDE version: 2.16.1

Additional context The garbled code shows random Chinese charaters, pain squares or the right emojis. Not sure if it's because my iPhone is in Chinese language.