I have a parallel action in my list workflow which will update a field (Log). I have 4 parallel actions which will run whenever an item is modified, check for different conditions and update a single field (Log).
Now when the workflow enters parallel action and conditions are true in 3 of the parallel branches and update is to be done. On my workflow history the update item action looks green and workflow completes successfully but it wouldn't have updated the column in sharepoint.
As i observe it will update the Log field in only one branch of the workflow in SP column.
