SSL::enable/SSL::disable unexpected behaviour

Just a thought, I see in your 1st irule you are making SSL disable in the clientside of the connection, Http request. Because when you do not sepcify context side, it will apply to the default connection side. So here it's SSL DISABLE for client SSL alone. But your serverssl is still enabled. Thereby when sent to serverside, serverssl still applies.

when HTTP_REQUEST {

  if {  } {
     select the tls-pool: enable server side SSL
    SSL::enable
    pool 
  }
  else {
     select the http-pool: disable server side SSL
    SSL::disable
    pool 
  }

}

If you try the below, it should work too.

when HTTP_REQUEST {

  if {  } {
     select the tls-pool: enable server side SSL
    SSL::enable
    pool 
  }
  else {
     select the http-pool: disable server side SSL
    SSL::disable
     Not really sure if both context sides can be mentioned in one command :very) SSL::disable clientside serverside
    SSL::disable serverside
    pool 
  }

}