We faced the same issue on HPE DL380 Gen10 after upgrade to 7.0U3l last weekend. We have 2 VMs on same host and same vswitch. One is WIN10 and the other is Server 2019. After upgrade WIN10 worked well , it could communicate both with Server 2019 and other servers outside the ESXi host. But Server 2019 could only communicate with WIN10 VM. All communications with other servers outside ESXi host were lost. We finally solved the problem by disconnecting virtual nic on Server 2019 VM and then reconnect it again. Some details: 1, Server network adapter is I350 which does not use ntg3 driver. 2,We tried to ping gateway and it returned Timedout (ping after arp -d). But arp record was created with correct MAC address which means data was successfully sent and arp echo also was successfully received. However further communications failed.