SSL Visibility version 3.x will not resign a retransmitted TCP packet if a Block Cipher is used
Last Updated December 06, 2018
As per https://en.wikipedia.org/wiki/Block_cipher, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called a block, with an unvarying transformation that is specified by a symmetric key.
Examples of Block Ciphers are CBC (Cipher Block Chaining) and GCM (Galois/Counter Mode).
When an SSL endpoint retransmits a lost packet whereby a Block Cipher is used, the exact bitstream is forwarded to the remote endpoint and will result in the packet being undecryptable and rejected by the remote endpoint.
An example of this scenario is given in the packet capture below.