Excuse me if this has already been discussed, I'm new to all of this.
I have version LibreELEC 9.2.5 on a Raspberry pi 4 (8Gb version).
I have a touch screen:
15,6 Zoll HDMI IPS LCD (H) 1920x1080 mit Gehäuse & VESA - Raspberry P, 154,98 €
After boot up I have no touch capability, multiple boots sometimes make it work, but mostly not.
Solution is unplugging the USB cable and switching it to another USB connector and it works 100% every time.
Hope this helps.