So a new problem I've recently found out was that my Master A router is having some trouble, I found this when I was having timeout to the main Mikrotik router and the app always timeout, so I did a ping to the Master A and found out that the ping is fluctuating really bad 10ms-20ms-250ms, and another time it just drops ping, I tried logging to the Master A web service it logs in first then it gives me an error message that no device was found and drops connection, when I try to log in again it doesn't load, it just doesn't load, I tried the same on the Slave device and it's working normally normal ping, login everything's normal. The problem is with the master device, both devices are in router mode with Dhcp off and connected to the mikrotik with ethernet cables, the only difference is that the Master device is using Ip on different subnet not sure if this has anything to do with it. So what might be the problem here? It was working normally around two weeks back I just don't know what happened suddenly I didn't even update the devices.
Edit : when I tried Pinging the Master device but connected to the slave device the ping is normal 6~20ms not drops, could the problem be with the master device only?