Hey,
Due to the failure of one of the SXT 5HnD devices, I bought a spare SXT 5nd r2 for it.
In general, I have to create such a connection, it worked on the previous equipment, but I do not remember the settings at 100%.
A request to check the settings because I’m doing something wrong. Antennas connect with each other but I do not even see the antenna on the other side (no other devices too). In general, the configuration is in the attachment, but the connection is used to send the internet to the other network.
I will be grateful for your help 
Try this:
On the Station (SXT5 Lite r2):
1.- Go to Bridge.
2.- Remove unknown port
3.- Add wlan1 port to the bridge
Cannot say for sure as I’m missing some details about your config, but once you do that Layer 2 between both networks should be fixed, try pinging between any devices (but the antennas).
Fix the IP Addressing:
On Station:
1.- Edit 192.168.1.9/24 on wlan1 and change it to bridge1
2.- Remove 192.168.1.9/24 from ether1-local
On AP:
1.- Edit 192.168.1.8/24 on wlan1-gateway and change it to bridge1
2.- Remove 192.168.1.8/24 from ether1-local
Next time you can post the whole config of a routerboard (an export): open a New Terminal then issue
/export hide-sensitive=yes file=DeviceConfiguration.rsc
.rsc file being a plaintext file, you can inspect them with any file editor, post it here, etc.