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Periodic Disconnection with DHCP DISCOVER

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LAYOUT

192.168.0.103(THE ONE LOSES THE CONNECTION - WIRESHARK CAPTURE)

192.168.0.84(THE ONE WORKS PROPERLY - WIRESHARK CAPTURE)

We have an app that receives data from one of our devices. We installed our receiver app to both Tablet(Win10-192.168.0.84) and Desktop(Win10-192.168.0.103). But we lose connection from mostly .103 and it seems like happens in every 1(sometimes 2) hour. But in exact time like 10:01:35 then 11:01:35 etc. The connection lose starts with DHCP discover packet from client(.103) then we get RST or FIN flag, and after time time SYN, SYN ACK and continues to communicate. Firstly I thought this might be a DHCP time lease problem, and reduce the lease time to 5 minutes and realized that it does not send DHCP discover, it just sends DHCP request. DHCP discover happens when we lose connection. Also while the time we cant ping the Router(192.168.0.1).But Tablet(192.168.0.84) still works properly without any disconnection.

Currently, I am out of ideas, what else could it be this kind of disconnection?

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