@sindy no the issue is still present the rndis MAC changes on every disconnect
after reading up on http://forum.mikrotik.com/t/random-connection-dropping/134297/1 i changed the STP to STP and the situation is so much better i can connect my android device to the network and the connection is much much much stable however it still disconnects but now i can attend meetings and do some work without the frustrating disconnection. the connection on cable is much more stable than wifi so my question now is what else can i check on wifi that may be causing the issue. since with no wifi device the link is stable