Hi, well I think it is normal, as a DSL modem router, longer time it is keeping running, heavier burden it has consitantly. To clear the cache and ensure its performance, a regular reboot is a good choice. 

And you can optimize the wireless settings to give it a shot. Including changing wireless channel and channel width.

Ensure the firmware is up to date as well. 

Hi Gray, thanks for your tips. Are you sure a reboot is needed? becasue I've another Archer V600 that right now is running on my office and I never rebooted it for a long time. This V300 drive me crazy.

What about WI channel and the width? why I need to change it? right now is on "auto" and "width on High".

The firmware is up to date (it could be upgraded online directly).

Alex

Tp-link support contact me for changing the device. I don’t know if this way will change the behavior, anyway I will write here again in next weeks. 

Ale

[UPDATE]

Got a new router today, its a different revison, the pakaging show V1.2 instead of  V1.0. Hope for a more stable hardware...

Alex