ProxySQL: Metrics for Client Frontend Connections not present

PMM-agent Version: 2.38.0
PMMVersion: 2.38.0

root@35118b84afc0:/# curl --user "pmm:/agent_id/0f5324ba-5f78-485f-8cf2-d94844ac26b6" http://localhost:42003/metrics | grep -i "proxysql_processlist_detailed_client_connection_count"
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 55446 0 55446 0 0 3008k 0 {}:{}:{} {}:{}:{} {}:{}:{} 3008k

Please see attached screenshot:

Steps to repro:
1) Clone repo: https://github.com/percona/pmm-qa/tree/PMM-7-Fix_PROXYSQL
cd pmm-qa/pmm-tests
2) docker run --detach --restart always --publish 443:443 --name pmm-server percona/pmm-server
3) bash pmm-framework.sh --pmm2 --pxc-version=8.0 --addclient=pxc,1
4) login into console on 127.0.0.1 ( or on the host ip)
5) Goto Proxysql Tab (left pannel), notice Client Frontend Connections pannel has no data/metrics