Is the Wan Mac address override working in 19 with Luci?

If I'm reading the makefile right, this looks like one of those devices which creates a separate wan_dev section in the network config.
If that's the case, it needs to be adjusted there.

There was some discussion a little while ago that LUCI was not properly handling this scenario, but I don't recall if or when it was fixed.

If guess it was after v18 though, maybe more like 18.06.2?

Context: MAC override does not work

and an OPEN Luci issue: