Just got my WDS working on 5G by following the guide here, thanks a lot! Is there any way to enable both 2.4G and 5G WDS with the EU firmware?

A follow up question on WDS. My PC is connected to the 2nd router's (TP-Link AC1200 from TM as repeater) 5Ghz connection, but from time to time I would find the wifi status showing "No Internet Access". When that happens I found the PC is being assigned a random IP address (i.e. 169.x.x.x.) rather than the normal internal subnet range (192.168.1.x) which should be assigned by the main router, as the 2nd router's DHCP is set to off. A reboot of the router would solve the problem and my PC would be given the correct IP Address.

What could be the reason and what have I missed from the WDS configuration?

I followed the WDS setup guide provided here at page29/30, the only part I didn't perform is the modified config.bin so the channel is assigned automatically but seems to stay on channel 36 so far, I've also fixed my main router to channel 36 for 5Ghz. Using 5Ghz from the main router as backbone, main router is (TP-Link Archer C5v ac1200 router) provided by Maxis.