I have a RUTX11 installed a month ago.
It disconnect all devices a couple of times per hour. Then connects everything i a few second.
The router is updated to the last firmware RUTX_R_00.02.06.1 and after that the wizard just adding a SSID.
Connection to 4G is perfect. Antennas are screwed tightly and there are nothing close to the router that can disturb.
Below is an example from the logs. 192.168.1.235 is a laptop that was disconnected
||Leased 192.168.1.242 IP address for client d8:f2:ca:a6:14:7c - W358714 in WiFi|
||Leased 192.168.1.235 IP address for client 9c:fc:e8:df:01:01 - 5CG0266B33 in WiFi|
||Leased 192.168.1.235 IP address for client 9c:fc:e8:df:01:01 - 5CG0266B33 in LAN|
||Authentication was succesful from HTTP 192.168.1.235|
||No entry found for IP (192.168.1.235).|
||Leased 192.168.1.158 IP address for client 34:e2:fd:bd:ef:bd - Varan-iPad-2 in LAN|
||Leased 192.168.1.235 IP address for client 9c:fc:e8:df:01:01 - 5CG0266B33 in LAN||