Linux bridge filters some kinds of packets and in some cases will be helpful to add the possibility of passthrough these packets.
Informational link https://interestingtraffic.nl/2017/11/21/an-oddly-specific-post-about-group_fwd_mask/
patch with support extended bitmap https://lists.linuxfoundation.org/pipermail/bridge/2015-March/009525.html
iproute2 allow defining this on bridge creation and also possible to define this via sysfs
echo 65535 > /sys/class/net/br0/bridge/group_fwd_mask
Proposed CLI command:
set interfaces bridge br1 bitmap 65535