Turning off 5GHz band increases boot time (RT-AC66U)

[Nightcro]

It seems that if i go to wireless-professional tab and try to deactivate the 5 GHz band, my router (RT-AC66U) goes nuts and increases the boot time by two-three times. This has been happening since i upgraded to 380.61
If i activate the 5 GHz band every thing goes back to normal.
Is there another way to disable it ? I am not using the 5 GHz atm, so there is no need to keep it on, but it seems i can't disable it without my router going crazy on boot time.

And why the hell this page keeps appearing so many times, it opens my browser automatically if my router takes a long time to boot.

Spoiler: Image

 

[RMerlin]

Honest question - why would you need to reboot the router often enough for the boot time to be an issue?

Anyway, anything related to wireless is outside of my control.

 

[Nightcro]

That's true, but when you have a father like mine that wants to be economical by saving power, it's kinda hard to keep it on.

Thanks.

 

[pete y testing]

turning off the 5 gig is going to save bugger all power consumption wise so why bother doing it if it then effects boot time ? even then unless you live on batteries the whole power consumption of the router is very minimal , i think someone said a router like this may consume about $12 a year , and turning the router on and off may actually reduce its life span as bootup puts the most strain on the components , sounds like a bit of false economy to me .