How come a bash script won't run without using xterm?

Question

Strange. I have a few scripts I use mostly after fresh install of Ubuntu. They used to work, now they don't. They are on an extra hdd, I thought may be permission issues, no. I installed VPN and xterm, scripts for VPN use xterm, they work. I tried adding xterm to scripts no longer working, now they work. So, it's working that way but I don't know what happened. I do have a fresh install. I wonder if just a bad install of Ubuntu. I have never had a problem.

@steeldriver

Double clicking in file manager has allways worked before.

This does not work.

#!/bin/bash
sudo apt update
sudo apt install -y xscreensaver xscreensaver-gl-extra xscreensaver-data-extra

This works.

#!/bin/bash
xterm -e sudo apt update
sudo apt install -y xscreensaver xscreensaver-gl-extra xscreensaver-data-extra