Wifi reconnected every 5 minutes

RouterOS Wireless Networking
1

I bought MikroTik RouterBoard RB711UA-2HnD, but I have a problem with wifi :frowning: . Mode select “ap-bridge”, client htc desire. Phone normal connect to AP, the signal level at both approximately -50dBm. Every 5 minutes phone disconnected, log in mikrotik writen:

02:34:16 wireless,info F8:DB:7F:42:A6:40@wlan1: disconnected, received disassoc: sending station leaving (8) 
02:34:20 wireless,debug wlan1: F8:DB:7F:42:A6:40 attempts to associate 
02:34:20 wireless,debug wlan1: F8:DB:7F:42:A6:40 not in local ACL, by default accept 
02:34:20 wireless,info F8:DB:7F:42:A6:40@wlan1: connected 
02:39:41 wireless,info F8:DB:7F:42:A6:40@wlan1: disconnected, received disassoc: sending station leaving (8) 
02:39:44 wireless,debug wlan1: F8:DB:7F:42:A6:40 attempts to associate 
02:39:44 wireless,debug wlan1: F8:DB:7F:42:A6:40 not in local ACL, by default accept 
02:39:44 wireless,info F8:DB:7F:42:A6:40@wlan1: connected 
02:45:05 wireless,info F8:DB:7F:42:A6:40@wlan1: disconnected, received disassoc: sending station leaving (8)

I tried disable encryption, reset configuration and use default setting but results no change.

2

looks like the client wanted to disconnect, maybe PC goes to sleep or powersave?

received disassoc: sending station leaving

just like log says “AP received question to disconnect, station leaving”

3

I think so too, but after disconnecting it himself connects and with other access points was not like this