Sophos UTM Mesh Wifi Bridge restart every 3 Minutes

Question

Hello, 
 i setup an Wifi Mesh as an Wifi Bridge to Ethernet. 
 The Mesh work for 3 Minutes. Then the "Mesh AP" seemes to restart. Then it work again for 3 Minutes. 
 The 2 APs are for Mesh only and don't broadcast other SSIDs. 
 In the logs i can see this when the AP reboot. But i have no idea why the AP reboots. 
 The Mesh SSID contains no special charater. 
 The APs for the Mesh have fixed channels for 2,4 and 5 ghz. 
 Any ideas what i can try? 
 
 2021:02:18-14:28:37 XXXXXXXXXXXXXXX logread[1434]: Logread connected to XXX.XXX.XXX.XXX:415
2021:02:18-14:28:45 XXXXXXXXXXXXXXX aweclient[1218]: aweclient.c (296) Failed to connect to 0.0.0.0.
2021:02:18-14:28:46 box-1 awed[16587]: [XXXXXXXXXXXXXXX] AP100 from XXX.XXX.XXX.XXX:34752 identified as XXXXXXXXXXXXXXX
2021:02:18-14:28:46 box-1 awed[16587]: [XXXXXXXXXXXXXXX] (Re-)loaded identity and/or configuration
2021:02:18-14:28:45 XXXXXXXXXXXXXXX aweclient[1218]: Cloudclient not found on ubus.
2021:02:18-14:28:49 box-1 awed[26412]: [XXXXXXXXXXXXXXX] ll_read: dead socket: Interrupted system call
2021:02:18-14:28:49 box-1 awed[26412]: [XXXXXXXXXXXXXXX] disconnected. Close socket and kill process.
2021:02:18-14:29:00 XXXXXXXXXXXXXXX aweclient[1218]: aweclient.c (2123) No reply get from last message, close socket.
2021:02:18-14:29:00 XXXXXXXXXXXXXXX aweclient[1218]: aweclient.c (296) Failed to connect to 0.0.0.0.
2021:02:18-14:29:01 box-1 awed[16587]: [XXXXXXXXXXXXXXX] ll_read: short read or connection error:
2021:02:18-14:29:01 box-1 awed[16587]: [XXXXXXXXXXXXXXX] disconnected. Close socket and kill process.
2021:02:18-14:29:01 box-1 awed[21519]: [XXXXXXXXXXXXXXX] AP100 from XXX.XXX.XXX.XXX:34753 identified as XXXXXXXXXXXXXXX
2021:02:18-14:29:01 box-1 awed[21519]: [XXXXXXXXXXXXXXX] (Re-)loaded identity and/or configuration
2021:02:18-14:29:00 XXXXXXXXXXXXXXX aweclient[1218]: aweclient.c (2108) Reconfiguration required. need_reconf = 1
2021:02:18-14:29:00 XXXXXXXXXXXXXXX aweclient[1218]: aweclient.c (2560) Exit from main loop with no error. Get new configuration.
2021:02:18-14:29:01 XXXXXXXXXXXXXXX aweclient[1218]: Cloudclient not found on ubus.