Vmware NSX for vSphere 6.2.2 bugs — lost network connection

We are using VMware NSX in our production environment for a long time.
And recently we got some problem with NSX, the symptoms is

Some VMs will lose network connection after migrated to another VM;
New firewall rules are not able to apply on some of the VMs.

After engaged VMware, VMware confirmed that it’s a bug in NSX.

VMware assigned about 1.6G heap memory for NSX firewall on each of the ESX hosts. If you applied too much rules or you have too many VMs and you’ll reach the memory limit. Then you’ll get this issue…

Current fix is to upgrade to 6.2.3…

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