How many devices are connected to the modem?
How about the wired connection when the issue happen?
Sometimes if too many devices are connected to the modem and some devices are downloading or streaming, then modem can't hold too much data then crash.

Wired connections are working, there is something strange about it, WPS led seems to be blinking when this is happening.

How about changing some wireless settings on the modem, such as disable wps, change channel to 1/6/11 and channel width to 20MHz.

Okay, disabling WPS didn't do anything still getting that weird error. Now trying to change channel to 1 and 20 MHZ.

Funny thing is, wi-fi is working when i change any wireless related settings, such as disabling WPS modem PIN and changing wireless channel and width.

I don't think changing these settings would work, but still gonna try. It is probably the firmware(which i have updated) or faulty hardware maybe.

This is my current firmware version: 0.9.1 1.2 v0035.0 Build 150427 Rel.63930n

Okay, Nothing worked so far, did a factory reset, see if anything changes. If not i'm returning this router.

Okay, returned, replaced the router issue still remains. How to fix this issue where is TP-Link staff ?

Email them about the issue at support@tp-link.com, they will reply you.

brutalsam wrote

Okay, returned, replaced the router issue still remains. How to fix this issue where is TP-Link staff ?