[FS#666] "Wireless is disabled or not associated" when channel mode "auto"

[LEDE Bugs]

The following task has a new comment added:

FS#666 - "Wireless is disabled or not associated" when channel mode "auto"
User who did this - Aurelio (aurelionet)

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I have the same problem in TL-WR849 (BR). I need help.
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=666#comment4495