Debug appears to show outgoing request containing details of running and nonrunning containers

I can see lines starting `tasker_1  | 2020-04-30 10:11:00.318 DEBUG 6 --- [sync-executor-4] org.apache.http.wire                     : http-outgoing-46 << …` with what looks like the output of `docker container ls -a` in JSON format following.

Is this call being made externally or is this some local detail of how tasker is invoking the container?