Hyper-V over SMB3 checkpoint very long creation time

Hello,

Have SOFS cluster for Hyper-V servers and Hyper-V clusters.

For VM's which are placed on SOFS server checkpoint creation takes enormous time. Checkpoint of VM takes from 1 to 10 minutes, depending on VM's ram size.

The same VM in local storage creation of checkpoint takes about 20-30 seconds.

Any thoughts why ?