One of the many frustrating aspects of Nintex Workflows Online is the extremely slow load times. When you are trying to develop workflows, it can sometimes take way too long to open the designer, update or publish. Even loading and configuring the actions takes too long. We have determined that using Nintex Online compared to Nintex OnPrem is taking 3 times longer in development time (perhaps we should invoice Nintex for the extra staff time).
The Mail Action seems to have more problems than any other action; The fonts and styles just have a mind of their own. You can select Arial and it saves as Times New Roman; you select 12pt and it saves as 10 pt. You try to add Item properties and it either ignores the existing styles or places the properties on a different line.
It seems Nintex are more interested in adding new features whilst they have not addressed the issues with the old features.
Come on Nintex......step up and fix these issues!!!