The virtual prod_https_vs is using the pool prod_https_pool, the current connections quantities is far from the same. What may be the explanation for this?
show ltm virtual prod_https_vs
Current Connections 4.9K
show ltm pool prod_https_pool
Current Connections 751
Then the results that you are seeing are normal. Due to oneconnect profile, exiting idle connections gets reused while sending request to the pool member. So the new server-side connection won't be initiated with pool member if the existing idle connection is available for reuse for other client requests.