When using PDG Service, there is always one last work item that cook never be completed.
According to the log, it seems that a non-existent ropfetch task was created, which caused an error to be thrown, and the ropfetch task that should have been executed was blocked forever, when using the default Cook Type 'Out-of-process' or canceling the current cook , re-executing cook will not cause this problem
example file attached with log.