[FS#13] Ath9k AP stays up for connected clients but doesn't show in scan on new ones

[LEDE Bugs]

The following task has a new comment added:

FS#13 - Ath9k AP stays up for connected clients but doesn't show in scan on new ones
User who did this - sz (szatam)

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Hey everyone,

Having the issue here as well. r1845 on a TL-WR1043N/ND v1.
Log shows "did not acknowledge authentication response" wifi-related messages.
Issuing "wifi" helps sometimes, after a while the wireless network completely dissapears and stops working, compined with increasing pings and packet loss on the wired interface as well.

Dmesg often shows random page faults (busybox, dnsmasq, dropbear, etc..):
[11948.873633] do_page_fault(): sending SIGSEGV to hotplug-call for invalid read access from 000000ec
[11948.882704] epc = 00439ff1 in busybox[400000+4a000]
[11948.887665] ra  = 00439fe5 in busybox[400000+4a000]

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=13#comment644