esp8266 以station的模式连接ap热点时，为什么会先回复WIFI DISCONNECT

[朝花夕拾]

请问；如下是我通过esp8266发送AT指令控制连接ap热点，可是为什么连接时，会先提示 WIFI DISCONNECT ？
AT+CWJAP_CUR="AndroidAP","846b0fdbaa42"

WIFI DISCONNECT
WIFI CONNECTED
WIFI GOT IP
OK

AT+CIPSTA_CUR?

+CIPSTA_CUR:ip:"192.168.43.188"
+CIPSTA_CUR:gateway:"192.168.43.1"
+CIPSTA_CUR:netmask:"255.255.255.0"
OK

请问，大家知道原因么？
我用的是AT固件信息是：
L:9 D:AT+GMR
L:42 D:AT version:1.2.0.0(Jul 1 2016 20:04:45)
L:31 D:SDK version:1.5.4.1(39cb9a32)
L:32 D:Ai-Thinker Technology Co. Ltd.
L:22 D:Dec 2 2016 14:21:16

[andreysnug]

I wanted to ask you if you connected esp8266 to arduino and connected to my wifi network
Can i send email from arduino with the AT commands ??