So you have a computer connected by hardware to the Mikrotik AP/Station which has no wireless connections at all?
This is my real connection:
Internet --> PTP Mikrotik --> PTP Mikrotik --> PTM Mikrotik (APBridge)--> Edimax Client --> My PC
This diagram works well up to PTM Mikrotik...
I get log messages like this:... extensive data loss first of disconnection between AP Mikrotik and Edimax Clients.
And this is my connection for testing:
Edimax Client --> My PC (connected by a patch-cord 1m.) (ping 125ms.) inside the client's house.
This was my last test for knowing potential problems.