### 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 (!editable) {
		return;
	}
	begin_complex_operation();
	Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (const int &i : caret_edit_order) {
		bool first_line = false;
		if (!p_split_current_line) {
			deselect(i);
			if (p_above) {
				if (get_caret_line(i) > 0) {
					set_caret_line(get_caret_line(i) - 1, false, true, 0, i);
					set_caret_column(text[get_caret_line(i)].length(), i == 0, i);
				} else {
					set_caret_column(0, i == 0, i);
					first_line = true;
				}
			} else {
				set_caret_column(text[get_caret_line(i)].length(), i == 0, i);
			}
		}
		insert_text_at_caret("\n", i);
		if (first_line) {
			set_caret_line(0, i == 0, true, 0, i);
		}
	}
	end_complex_operation();
}
void TextEdit::_move_caret_left(bool p_select, bool p_move_by_word) {