"Test Complete" in openvas.log but still running on web console

GVM versions:-
Greenbone Security Assistant - 9.0
Greenbone Vulnerability manager- 9.0.0
Openvas Scanner- 6.0.0

Host OS- CentOS 7
Container OS- Ubuntu 18.04
Kernel- Linux 3.10.0-1062.18.1.el7.x86_64 #1 SMP Tue Mar 17 23:49:17 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Installation Docker Image- https://hub.docker.com/r/securecompliance/gvm/dockerfile

My requirement is scanning 5 targets concurrently with one host each. I have scheduled a scan.I notice the scans on web console gets stuck after some time even though I can see processes of tests running. After a while when all the tests are completed i see the following message in the openvas.log

main:MESSAGE:2020-05-11 17h50.41 utc:2696: Test complete
main:MESSAGE:2020-05-11 17h50.41 utc:2696: Total time to scan all hosts : 8415 seconds

but on the web console that task is still running and is the progess is stuck. Even after few hours the scan doesn’t complete nor does the progress of task change. Meanwhile I cannot see any processes related to scanning too.

I noticed a warning in gvmd.log

main:WARNING:2020-05-11 16h21.11 UTC:22669: write_to_client_unix: failed to write to client: Broken pipe