trunk in bridge mode

hi guys.

I have several local networks that are far from each other and separate from each other. Mikrotik radio is used in all of them to communicate with the units that are less than a hundred meters away from the main rack room. When I put the communication port of the switches that are connected to the wireless link in the trunk state, the clients of the units that are connected to the network with the radio get the IP address from the switch, but the ping of the radios is interrupted. As soon as I put the switch port that is connected to the radio link in access mode and in vlan 2, the ping of the radios is established.

Why does this happen and what is the solution?
It is worth mentioning that in my other links, I have connected the Cisco switch with the same settings to the Radio Basebox and Dynadish, and through the trunk port, I have both the ping of the radio link and the ping of the switches and clients on the side of the station far from the core switch .
I drew my network schematic in Visio and attached it in my question
trunk-sxt.jpg

I am still waiting for the answer.

If bridge configuration on SXT doesn’t have any VKSN-related config, then its IP layer communicates strictly vua untagged frames. Diagram mentions VID 2 as being used as native on trunk between cisco snd SXT (at least the upper-left pair), which means that 192.168.2.0/24 should be used in VLAN 2 on cisco side.

If there is some VLAN config on SXT, then you better post config so that we can see what exactly is in it.