On a RT-AC68U running 386.2_2 enabling the wireless MAC filter (either 2.4 or 5) blocks the site survey. This can create confusion when someone loads a CFG (which had the MAC filter turned on) and selects repeater mode for which the subsequent survey fails to list any SSIDs. Yes, the SSIDs can be manually configured, but it's still disconcerting to see the site survey not return anything. In router mode if one wanted to use the survey they'd have to turn the MAC filter off first. I'm guessing this is not intended.