Perhaps its no longer Riga Operating System and Mikrotik is being bought out by Wipro and the new name is Indian Operating System ???IOS-7?
for a 300 series switch??? What L3............... its all layer 2maybe in your switch the config end up doing L3 forwarding, if you need that you must configure L3 Hardware Offloading
L3 Hardware Offloading
https://help.mikrotik.com/docs/spaces/R ... Offloading
Just to be clear, you are not using them as paperweights?But I had 0 problems with new wAP ax so far. They are rock solid