wcs2228
9
OpenWRT Extender network mode uses the relayd package and I seem to recall that the GL.iNet router will generate virtual MAC addresses when I tried it, not pass the original source MAC addresses.
I have not used WDS mode, which is supposed to work as a Layer 2 transparent bridge with the original source MAC addresses.
I do not know why you get the ARP messages. Does it at least work in Extender and/or WDS mode?