### Godot version

4.0 beta 15

### System information

Windows 10

### Issue description

It happened with both Google IME and MS-IME, and there was no problem until Beta14.
When typing Japanese characters, it is common to select a character from the suggestion window and then start typing the next character before confirming.
In this case, uncommitted characters are forcibly committed, and input of the next character begins.

**↓Beta15**

https://user-images.githubusercontent.com/186786/214753450-b493cca6-2644-4b3d-8cd2-660565cc3547.mp4

**↓Beta14**

https://user-images.githubusercontent.com/186786/214755127-dde819cc-4d63-403a-99b0-09821671f74e.mp4



### Steps to reproduce

It happened with both Google IME and MS-IME in beta15

### Minimal reproduction project

It is project independent and happens in the editor.
if (line_wrapping_mode != p_wrapping_mode) {
		line_wrapping_mode = p_wrapping_mode;
		_update_wrap_at_column(true);
	}
}
TextEdit::LineWrappingMode TextEdit::get_line_wrapping_mode() const {
	return line_wrapping_mode;
}
bool TextEdit::is_line_wrapped(int p_line) const {
	ERR_FAIL_INDEX_V(p_line, text.size(), 0);
	if (get_line_wrapping_mode() == LineWrappingMode::LINE_WRAPPING_NONE) {
		return false;
	}
	return text.get_line_wrap_amount(p_line) > 0;
}
int TextEdit::get_line_wrap_count(int p_line) const {