Indeed seems to be a bug.
I have downgraded to 4.16 stable, reset the configuration and everything seems to be working as expected.

Is there a release log mailing list/rss or something I could subscribe to, so I can learn when this is fixed?

Thanks.

Thanks for the suggestion tasos but just tried the "station pseudobridge" without any luck.
Still getting the same weird error.

Hey everyone, This is my first time playing with mikrotiks so please let me apologize in advance if some of these seem trivial to you people. I have two routeros 5.0rc8 level 4 installations with R52NM wifi cards and 5ghz antennas. On is set to AP bridge and the other to Station, both at 5Ghz N only...