Kong pro firmware for IPQ806x (R7500, R7800, EA8500, ...)

A few minutes ago I updated my R7800 from the release 23.05/ipq806x-nss from May 2nd to the release from August 5th.

I would like to use my DDNS alias and the port shares internally as well. To do this, I wrote ifconfig br-lan promisc in rc.local a few years ago.

This no longer seems to be sufficient since the update. Do you have an idea why it doesn't work?