Hello,
I have several mini networks deployed using AP shadow in WDS mode to expand my broadcast range as needed. After updating to the latest 4.X firmware version from the website, everything appeared to function correctly at first. However, when I power off the master, the WDS communication fails to automatically resume. To resolve this issue, I am compelled to restart my clients. This was not an issue with the previous 3.X firmware version. Despite conducting tests and setting a 2.4 GHz channel, the problem persists. Any suggestions would be greatly appreciated 
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Thank you very much.
