Config wifi for tasmota mqtt constitutionally reset to default

I am facing a problem at the connection of rf sonoff bridge with my wifi. the wifi password for the local network is constantly return back to ‘***’ (the default) and i reset it again every time to the right password, moreover, there is no connection. Maybe there is something else wrong but i am not aware yet.
I installed the mqtt broker and set it with different username and password. the below is what i have:
from mqtt log:

[12:33:30] INFO: [INFO] found mqtt on Home Assistant
1614767610: New client connected from 172.30.32.1 as 1LmARzYV0BeuganxjUzoNT (p2, c1, k60, u'mqtt').
1614767644: New connection from 192.168.1.113 on port 1883.
1614767644: New client connected from 192.168.1.113 as mqtt_15257908.6ca807 (p2, c1, k60, u'mqtt').
1614767666: New connection from 192.168.1.112 on port 1883.
1614767666: Socket error on client <unknown>, disconnecting.
1614767758: New connection from 192.168.1.112 on port 1883.
1614767758: Socket error on client <unknown>, disconnecting.
1614767859: New connection from 192.168.1.112 on port 1883.
1614767859: Socket error on client <unknown>, disconnecting.
1614767970: New connection from 192.168.1.112 on port 1883.
[12:39:31] ERROR: [ERROR] Auth error with mqtt
1614767971: Socket error on client <unknown>, disconnecting.

from tamsota:

 00:00:00.049 CFG: Loaded from flash at F6, Count 14
00:00:00.054 SER: Set to 8N1 19200 bit/s
00:00:00.055 QPC: Count 1
00:00:00.059 SER: Set to 8N1 19200 bit/s
00:00:00.062 Project tasmota Tasmota Version 9.3.0(tasmota)-2_7_4_9(2021-02-19T11:07:30)
00:00:00.563 WIF: Connecting to AP1 hashem Channel 9 BSSId 40:9B:CD:C8:18:E4 in mode 11n as RF-BRIDGE-6630...
00:00:01.753 WIF: Connected
00:00:02.005 HTP: Web server active on RF-BRIDGE-6630 with IP address 192.168.1.112
11:28:17.017 MQT: Attempting connection...
11:28:17.227 MQT: Connect failed to 192.168.1.113:1883, rc -2. Retry in 10 sec
11:28:20.468 QPC: Reset
11:28:28.048 MQT: Attempting connection...
11:28:28.264 MQT: Connect failed to 192.168.1.113:1883, rc -2. Retry in 20 sec
11:28:49.009 MQT: Attempting connection...
11:28:49.221 MQT: Connect failed to 192.168.1.113:1883, rc -2. Retry in 30 sec
11:29:20.011 MQT: Attempting connection...
11:29:20.225 MQT: Connect failed to 192.168.1.113:1883, rc -2. Retry in 40 sec
11:30:01.017 MQT: Attempting connection...
11:30:01.235 MQT: Connect failed to 192.168.1.113:1883, rc -2. Retry in 50 sec
11:30:52.026 MQT: Attempting connection...
11:30:52.241 MQT: Connect failed to 192.168.1.113:1883, rc -2. Retry in 60 sec

broker confi:

logins:
  - username: user
    password: '****'
anonymous: true
customize:
  active: false
  folder: mosquitto
certfile: fullchain.pem
keyfile: privkey.pem
require_certificate: false

mqtt wifi (always return to the default!!
image

any suggestions pls.
thanks