### 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.
ERR_FAIL_COND(p_caret > carets.size());
	if (has_selection(p_caret)) {
		DisplayServer::get_singleton()->clipboard_set(get_selected_text(p_caret));
		cut_copy_line = "";
		return;
	}
	StringBuilder clipboard;
	Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (int i = caret_edit_order.size() - 1; i >= 0; i--) {
		int caret_idx = caret_edit_order[i];
		if (p_caret != -1 && p_caret != caret_idx) {
			continue;
		}
		int cl = get_caret_line(caret_idx);
		if (text[cl].length() != 0) {
			clipboard += _base_get_text(cl, 0, cl, text[cl].length());
			if (p_caret == -1 && i != 0) {
				clipboard += "\n";
			}
		}
	}
	String clipboard_string = clipboard.as_string();
	DisplayServer::get_singleton()->clipboard_set(clipboard_string);
	cut_copy_line = clipboard_string;
}
void TextEdit::_paste_internal(int p_caret) {