Second Arduino causing first Arduino to disconnect

Hi guys, I’m after some help please!

I use Simhub for my Cube Controls CSX3 and for one Arduino that I use for wind. All has been working fine. I added a flag lcd display today that was previously running on iFlag software.

I used the Arduino set up tool and got it running fine. But now my wind Arduino has stopped working. Checking the Com ports on the Arduino page of Simhub it is showing as disconnected.

If I disconnect the lcd display the wind Arduino UNO reconnects and starts working again.

I guess there’s some form on conflict but I am really not sure what to do! Any advice very much appreciated.

Many thanks,
Dom