Information
This setting controls the number of times that TCP retransmits an individual data segment (non-connect segment) before the connection is aborted. The retransmission time-out is doubled with each successive retransmission on a connection. It is reset when responses resume. The base time-out value is dynamically determined by the measured round-trip time on the connection.
Solution
Make sure 'MSS: (TcpMaxDataRetransmissions IPv6)' is Enabled and set to 3.