http://forum.mikrotik.com/t/not-responding-f-k-a-sa-query-timeout/168864/1
Try the nightly on the AP:
Caution, this is pre-release that most likely contains other bugs. I can’t guarantee that with this version something will not burst into flames or something. > https://mt.lv/nightly-build > DO NOT INSTALL THIS if you use it for something important.