BUG: Japanese input adds empty return

### GrapesJS version

- [x] I confirm to use the latest version of GrapesJS

### What browser are you using?

Chrome Version 133.0.6943.127 (Official Build) (arm64)

### Reproducible demo link

https://grapesjs.com/demo.html

### Describe the bug

**How to reproduce the bug?**
1. Create a text block
2. Start typing any japanese characters
3. Choose an entry from the auto-suggestion float box

**What is the expected behavior?**
Chosen entry should be entered into the text block

**What is the current behavior?**
Chosen entry is entered but is invisible and new return in added to the bottom of the text block

If is necessary to execute some code in order to reproduce the bug, paste it here below:
n/a

https://github.com/user-attachments/assets/3dd992d8-dc13-4043-885a-d56ea57a1964

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct