VIP-targeting-VIP solution using Standard and performance L4 VS

In that scenario since the standard virtual server is terminating TLS the traffic still all needs to be handled by the first tmm. The fastest path is to just let it do its job and forward the traffic.

Forwarding it to a second virtual server starts another handshake (w/ TCP) between two tmm’s where the second makes a load balancing decision, so essentially you’re adding unnecessary overhead by forwarding just to have a load balancing decision made at the second virtual server. 

This is a good reference article. https://my.f5.com/manage/s/article/K8082#l4

The FPGA is in the dataplane on ingress and egress from the switch (iSeries for example) or is the network interface on rSeries. Therefore if the first tmm terminating TLS has to process the traffic, it's being released down to the FPGA for forwarding on egress already.