Can it be due to some hardware conflicts, or possible attacks? I noticed high CPU usage close to disconnect moments. Hardware is original Intel board with 2 GHz Celeron and 128 Mb RAM. Using 3 Atheros cards on RouterBoard 4 miniPCi-to-PCI adaptor. What else can it be? Any solutions?

The same problem - clients disconnecting and reconnecting after some seconds some times a day. Atheros cards and 2.8.17. Signals about -60