VMware has released NSX for vSphere 6.2.5, this is a maintenance release that contains the bug fixes

The 6.2.5 release is a bugfix release that addresses a loss of network connectivity after performing certain vMotion operations in installations where some hosts ran a newer version of NSX, and other hosts ran an older version of NSX.

Details of fixes can be checked Here

But remember still vSphere 6.5 is not supported !!!!!!!!!!