Websocket SSL VS - Disable port translation?

I have a VS configured to perform SSL offload with both the VS and pool member listening on port 443 (configuration below). The pool member in this scenario is a WebSocket application server. By default the VS originally had "port translation" enabled however the application owner reported the application was not working with this configuration. During troubleshooting I disabled port translation which reportedly resolved the issue. I am not familiar with WebSocket and was wondering if anyone has any input as to why disabling port translation appears to have resolved this issue.

 

 

 

virtual test {

 

translate service disable

 

snat automap

 

pool websocket_pool

 

destination 10.10.10.10:https

 

ip protocol tcp

 

profiles {

 

serverssl {

 

serverside

 

}

 

tcp {}

 

example.com {

 

clientside

 

 

pool websocket_pool {

 

members 10.10.10.11:https {}