Exporter causes a swap leak

[ginerama]

Once I configured the maxscale_exporter, using the docker image, the MariaDB Maxscale uses all the swap and don't free them until I restart the Maxscale Docker.

In the graph you can see the usage of the swap. In order to release them I execute a swapoff/swapon, but this only moves the swap to the RAM:

# docker exec  maxscale maxadmin -h maxscale  show version
2.3.11

This happens in the Master node and in the Slave node.

Any clue about what's happening? If you need more information, please, let me know.