Mikrotik SXT. When creating a bridge, access to the device is lost. What is the reason?

Question

Mikrotik

Network diagram?
ISP <---> Router (Mikrotik RB1100AHx2) <---> swich (unmanaged) <---> Access point (Mikrotik SXT) <--->
I want to configure the Mikrotik SXT client in AP Bridge mode.
1) Create a new bridge - done!
2) I first add the wlan1 interface -done!
3) I assign an ip-address to the bridge - done!
4) I add an interface to the eth1 bridge - fail ...
The device completely falls off. I can’t find it by ip, I can’t find it by mac, only resetting to factory settings helps.
BUT! When the head router is disconnected from the network (Mikrotik RB1100AHx2), the antenna comes to life and is visible in the Neighbors.
Grandmother Vanga suggests that the problem is just in the head router. But what exactly is not clear to me.

mangle rules

chain=input action=mark-connection new-connection-mark=ISP1-con passthrough=yes in-interface=ether11 log=no log-prefix=""
2 chain=output action=mark-routing new-routing-mark=ISP1-rt passthrough=no connection-mark=ISP1-con log=no log-prefix=""
3 chain=input action=mark-connection new-connection-mark=ISP3-con passthrough=yes in-interface=ether13 log=no log-prefix=""
4 chain=output action=mark-routing new-routing-mark=ISP3-rt passthrough=no connection-mark=ISP3-con log=no log-prefix=""
5 chain=forward action=mark-connection new-connection-mark=ISP1-con-f passthrough=no in-interface=ether11 log=no log-prefix=""
6 chain=prerouting action=mark-routing new-routing-mark=ISP1-rt passthrough=yes connection-mark=ISP1-con-f in-interface-list=!myISP log=no log-prefix=""
7 chain=forward action=mark-connection new-connection-mark=ISP3-con-f passthrough=no in-interface=ether13 log=no
log-prefix=""
8 chain=prerouting action=mark-routing new-routing-mark=ISP3-rt passthrough=yes connection-mark=ISP3-con-f in-
interface-list=!myISP log=no log-prefix=""

In the marking, I do not see an error, although I may be mistaken. But I can’t understand what exactly cuts the visibility of the antenna.

Answer 1

When creating bridges, first add the eth1 interface, and then wlan.
When you add a wlan first, you put the interface's MAC wlan on the bridge, so access is lost.
PS. I do not remember in which version, when creating the bridge, the Admin MAC address field appeared. There you drive in the MAC interface that is currently connected and the connection will not be lost.

Answer 2

Hap-mini
RouterOS 6.45.6
I don’t know if the question is relevant for anyone or not, but I suffered for a long time with the same problem, when creating Bridge from the winbox, it was thrown out and the router simply disappeared. I rummaged through a bunch of information and didn’t find anything (maybe I didn’t look well) and once again resetting the settings with the reset button and pulling out the wires, I came to the conclusion that the whole cant was in the plugged cable from the provider! During the initial setup, port 1 was plugged in - the provider's cable, port 2 - the PC cable (the router falls off when creating the bridge). Nothing is plugged in except port 2 - PC cable (everything works and is configured, nothing falls off).