I had issue with my router getting disconnected from devices on random or the devices were struggling to connect to the network,  I tried factory reset and reconfiguring my A6 but same issue used to arise after sometime, later I realized it might be due to the number of clients connected to the router which was more or equal to 15 Clients, Can this be the issue why I am facing such problem, If yes can anyone suggest any solution?

PS: I also have RE300 connected to A6 in a mesh network.