SQL Server Pool stay sleeping in any request from docker containers

I am trying to troubleshoot when I request a web server for the SQL server … the connections are not being closed … they have sleeping status … and are only removed from the pool after the container is restarted.
Has anyone ever experienced this?

I try to force ClearAllPool, but this doenst work on Linux…and pool growing up faster.
I dont know what can I do…any suggestion?