Model : Archer D7

Hardware Version :

Firmware Version : 0.9.1 0.5 v002d.0 Build 140225 Rel.37189n

ISP : [/COLOR]

Hi all, I would like to ask you about a problem I'm facing in the company I work for.

We have setup a TP-Link Archer D7 in Wireless router modem (F.W: 0.9.1 0.5 v002d.0 Build 140225 Rel.37189n , HW Ver.: Archer D7 v1 00000000 ).
Sometimes the WIFI signal looses connectivity. In detail, the WIFI SSID still appears on our PC's available connection, but we have no functionality (neither internet nor LAN connections) if we were already connected to it, otherwise we have no ability to connect at all for devices that weren't connected to it.
The only solution is to reboot the modem router. Is there a proper way to fix this?

Thanks very much in advance
Archer D7 v1 00000000