Conntrack_tftp not working as expected

Hi Team,

i recently employed the latest rolling release vyos-1.4-rolling-202303280317, after which conntrack_tftp is no longer operating as expected. that is to say when pushing configs to our tftp server via a vyos router with a firewall employed on both its WAN and LAN interface. The initial pack on port 69 is allowed but subsequent packets in the ephemeral range are rejected. Any ideas??

Do you use firewall?