### Godot version

v4.0.beta.custom_build [13f0158]

### System information

Windows 10

### Issue description

When doing operations (`begin_complex_operation` and `end_complex_operation`) with multiple selections in TextEdit, some of these selections don't revert upon undo. This behavior is affects some of script editor's operations, like duplicate selection and delete lines.

### Steps to reproduce

Open script editor, make multiple selections. Keep in mind what you have selected. Do duplicate selection (ctrl+shift+D). Undo (ctrl+Z). Compare the result to what you remember.

### Minimal reproduction project

N/A
int line_width = 0;
	for (const Line &l : text) {
		if (l.hidden) {
			continue;
		}
		
		if (l.width == max_width) {
			line_width = max_width;
			break;
		}
		line_width = MAX(line_width, l.width);
	}
	max_width = line_width;
}
void TextEdit::Text::invalidate_cache(int p_line, int p_column, bool p_text_changed, const String &p_ime_text, const Array &p_bidi_override) {
	ERR_FAIL_INDEX(p_line, text.size());
	if (font.is_null()) {
		return; 
	}
	if (p_text_changed) {