In one Nintex workflow I have developed, I had a strange bug. In short:
- the workflow updated the current item
- and then removed the write rights to the item
Well, what is strange is that I had workflow errors, and logging in the history list, I could clearly see that some operations where logged before others, really difficult to understand...
In this article it is explained that some actions are batched, in particular when is a mix of SharePoint and Nintex workflow actions.
The solution is: use the Commit Pending Action.