Hello ! I just went through my EAP245's and was shocked to find out that the majority of them are losing packets, like this: 

PING 8.8.8.8 (8.8.8.8): 56 data bytes

Request timeout for icmp_seq 0

Request timeout for icmp_seq 1

64 bytes from 8.8.8.8: icmp_seq=2 ttl=117 time=16.405 ms

64 bytes from 8.8.8.8: icmp_seq=3 ttl=117 time=12.990 ms

Request timeout for icmp_seq 4

64 bytes from 8.8.8.8: icmp_seq=5 ttl=117 time=10.515 ms

64 bytes from 8.8.8.8: icmp_seq=6 ttl=117 time=10.402 ms

Request timeout for icmp_seq 7

Request timeout for icmp_seq 8

64 bytes from 8.8.8.8: icmp_seq=9 ttl=117 time=10.822 ms

Someone complained that the video conference didn't work well. This would explain this. 

It was easily fixed by just rebooting them. I had let them run for about 9 months. Omada Controller is showing no sign of packet-loss: the graph for drop rate was always zero. I don't understand why it wasn't showing anything. 

The problem is, I cannot find it out unless I check them one by one in person. It seems to be a good idea to reboot them regularly: I will just find a chance when nobody is using that AP. Could anyone please tell me how often I should reboot them ? Once a month? I will appreciate your advice !