Help, IPv6 not working

[etokupzu]

Clients in LAN get ipv6 addresses but can't ping opnsense box and outside world.
WAN is set to use DHCP and SLAAC (if I set it to DHCPv6, the LAN interface won't get an IPv6 address).
LAN is set to static ipv4 and Track interface WAN.
Clients in LAN are set to DHCP (IPv4) and auto (IPv6).
Everything else are left in default mode as in opnsense LiveCD version 22.7.
All WAN, LAN, and clients get IPv6 addresses, but clients can't ping the opnsense box.
opnsene is runing in virtualbox in LiveCD mode.
Any suggestions to get the IPv6 working? Thanks in advance.