Hi again,
The space in the committer email was a red herring. Can someone (@Loic_Otten ? 
) provide a thread dump?
To get a thread dump, connect to the machine having the issue while the process is hanging (not easy on CI, but maybe you can reproduce by running the scanner locally?), then use any of the techniques here: https://www.baeldung.com/java-thread-dump
Thx!,
Ann