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.
Web browsers might receive an HTTP 503 error message.
SSL Visibility version 3.x does not support resigning of retransmitted TCP packets for Block Ciphers such as, but not limited to, CBC and GCM.
If support for resigning of retransmitted TCP packets for Block Ciphers is required, upgrade to SSLV version 4.x.