You're definitely not the only one. I've also received a [very] few emails regarding this. So while clearly not everyone using Windows 10 is having this issue, the number of those experiencing it is not insignificant. I'm still unable to reproduce, but I've been trying different configurations and updates in my Windows 10 images to try to make it happen. I thought I had reproduced it at one time, as I experienced a very real, almost extreme, latency, but after 30 to 45 seconds it went away entirely and I've not been able to make it happen again.
I queried someone who had sent an email regarding this issue, and their experience was that latency started to occur as the tournament grew larger in players. As players busted out, the latency began to subside. Has this been anyone else's experience?