My servers are often disconnected and must be restarted on the management page to be accessed again. I use the scaleway server that is the reason why
Normally, if a VPS get disconnected on RDP or Putty, one can just reconnect it.
But in your case you said, you have to restart whole VPS(through web management page) to get connected again,in that case your VPS is not responding, its not same as disconnected.
I think because the script makes vps lose my connection when I run 20 vps, there are 10 vps that are constantly disconnected and have to be restarted on the management page.
No way, script has job to install Windows Server OS on top of Linux OS.
Once Windows sever get installed and you successfully connected to your Windows RDP via IP: PORT(through VNC,etc) for 1st time, script job is done

After that KVM(QEMU) took control over Virtualization.
Now if your VPS not connecting/responding, its problem of you VPS or ISP, they might have a limit.
I am using Scaleway since long time, encountered such issues only 3 or 4 times out of 100 times, though I never ran 20 instances at a time!
You should create a Support Ticket on Scaleway.com about your VPS problem.
Another thing, I am not sure whether you are using this option or not,but I suggest not to use "delete existing Linux OS" option of the Script
Regards