You can see the backtrace related to ENS on vmkernel core with PF Exception type 14. The backtrace may be different each time it occurs because it depends on page fault timing. LACP port creation is operated during edit lag configuration or NSX-T upgrade with LACP configuration.
With ENS enabled, ESXi Host cannot handle large LACP port index properly which is managed in inside operation. If LACP port is created with over 127 port index during LACP configuration, it leads to pointer address corruption. ESXi Host will face PSOD when it access to the pointer address because it is not loaded on physical memory.
If LACP port creation is operated with all of the following conditions (a)-(c) met, you will face this PSOD.
(a) ESXi version is prior to 7.0
(b) ENS is enabled on the N-VDS
(c) Current largest port index is larger than 122 on the N-VDS
port index:1
clientName:Management
port index:2
clientName:LACP_MgmtPort
port index:3
clientName:lag
port index:4
clientName:vmnic1
port index:5
clientName:Shadow of vmnic1
port index:6
clientName:vmnic2
port index:7
clientName:Shadow of vmnic2
port index:9
clientName:L2CtrlPort
port index:10
clientName:vdr-vdrPort
port index:125
clientName:vm-test.eth0