### 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 caret_blink_enabled;
}
float TextEdit::get_caret_blink_interval() const {
	return caret_blink_timer->get_wait_time();
}
void TextEdit::set_caret_blink_interval(const float p_interval) {
	ERR_FAIL_COND(p_interval <= 0);
	caret_blink_timer->set_wait_time(p_interval);
}
void TextEdit::set_move_caret_on_right_click_enabled(const bool p_enabled) {
	move_caret_on_right_click = p_enabled;
}
bool TextEdit::is_move_caret_on_right_click_enabled() const {
	return move_caret_on_right_click;
}
void TextEdit::set_caret_mid_grapheme_enabled(const bool p_enabled) {
	caret_mid_grapheme_enabled = p_enabled;
}
bool TextEdit::is_caret_mid_grapheme_enabled() const {
	return caret_mid_grapheme_enabled;
}
void TextEdit::set_multiple_carets_enabled(bool p_enabled) {
	multi_carets_enabled = p_enabled;
	if (!multi_carets_enabled) {
		remove_secondary_carets();
	}
}
bool TextEdit::is_multiple_carets_enabled() const {