### 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.
const int old_width = text.write[p_line].width;
	int line_width = get_line_width(p_line);
	text.write[p_line].width = line_width;
	
	if (old_width == max_width && line_width < max_width) {
		_calculate_max_line_width();
	} else if (!is_hidden(p_line)) {
		max_width = MAX(line_width, max_width);
	}
}
void TextEdit::Text::invalidate_all_lines() {
	for (int i = 0; i < text.size(); i++) {
		text.write[i].data_buf->set_width(width);
		if (tab_size_dirty) {
			if (tab_size > 0) {
				Vector<float> tabs;
				tabs.push_back(font->get_char_size(' ', font_size).width * tab_size);
				text.write[i].data_buf->tab_align(tabs);
			}
			
			text.write[i].width = get_line_width(i);
		}
	}
	if (tab_size_dirty) {
		_calculate_max_line_width();
		tab_size_dirty = false;
	}
}
void TextEdit::Text::invalidate_font() {