### 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.
return editable;
}
void LineEdit::set_secret(bool p_secret) {
	if (pass == p_secret) {
		return;
	}
	pass = p_secret;
	_shape();
	queue_redraw();
}
bool LineEdit::is_secret() const {
	return pass;
}
void LineEdit::set_secret_character(const String &p_string) {
	
	
	ERR_FAIL_COND_MSG(p_string.length() != 1, "Secret character must be exactly one character long (" + itos(p_string.length()) + " characters given).");
	if (secret_character == p_string) {
		return;
	}
	secret_character = p_string;
	_shape();
	queue_redraw();
}
String LineEdit::get_secret_character() const {
	return secret_character;
}
void LineEdit::select(int p_from, int p_to) {