Fences Move When Monitor Off?

Hello Peeps, when my second monitor goes to sleep, but my first monitor stays on all the fences I have placed on the second monitor get moved to my first monitor.

I don't remember this being an issue with Fences 3? So I am wondering if anyone knows what is going on and how I can stop this behaviour as every time I wake up my second monitor I have to move all the fences back to it that I had previously put there.

Thanks.