### 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.
caret_mid_grapheme_enabled = p_enabled;
}
bool LineEdit::is_caret_mid_grapheme_enabled() const {
	return caret_mid_grapheme_enabled;
}
bool LineEdit::is_caret_blink_enabled() const {
	return caret_blink_enabled;
}
void LineEdit::set_caret_blink_enabled(const bool p_enabled) {
	if (caret_blink_enabled == p_enabled) {
		return;
	}
	caret_blink_enabled = p_enabled;
	set_process_internal(p_enabled);
	draw_caret = !caret_blink_enabled;
	if (caret_blink_enabled) {
		caret_blink_timer = 0.0;
	}
	queue_redraw();
	notify_property_list_changed();
}
bool LineEdit::is_caret_force_displayed() const {