Hello,
Could you please specify what you mean by “disappears”? Are WiFi clients losing their connection randomly, or do they not see your RUT in the available WiFi networks? Or is there something else happening?
The signal will always show 0% when there are no active connections. Once a device is connected, you will see this number change.
More information about wireless can be found on our wiki page RUT240 Wireless - Teltonika Networks Wiki.
Best Regards,