Issue with two IR Touch Screens on Ubuntu 24.04 – Only One Detected as Input

I'm facing an issue connecting two old IR touch screens on Ubuntu 24.04. The models have the ID 6615:0080. The system detects both screens when I run lsusb:

Bus 003 Device 004: ID 6615:0080 IRTOUCHSYSTEMS Co. Ltd. USB TouchScreen
Bus 003 Device 005: ID 6615:0080 IRTOUCHSYSTEMS Co. Ltd. USB TouchScreen

... but after installing the drivers from the official website, only one of them appears in the input device list. xinput list:

IRTOUCH_MOUSE     	id=16	[slave  pointer  (2)]

The other screen remains inactive and is not recognised as an input device. Both touch screens can only send events as a pointer, but I can't get them to work simultaneously. Has anyone encountered a similar issue, or does anyone have an idea on how to make both screens work at the same time? Any help or suggestions would be greatly appreciated!