Linked clone pool is taking too much time

I am trying view 7.5 in my home lab.

With windows 10, linked clone pool of 200 VM is taking forever (it went for 12 hours), even after that few VMs were in the Error/Agent Unreachable state.

While I dont see the problem with Instant clone.

I know that Instant clone is faster, but Linked clone cant take so much time.

I also tried to do the pool creation in batch of 50 VMs. And I was able to create 200 VM in around 45 minutes.

So I am wondering, am I missing any setting here ?