I have a strange problem.
When I try to configure loop on nintex I only see white screen.
On attachment is screen with view.
Did try closing and re-opening the workflow?
Yes, I did it.
Still this same.
I would suggest use the "For each" action. This is more reliable and executes without any time delay between the loop.
A Loop action has 5 min delay between items in a loop.
This blog post on how to use "for each" by Vadim Tabakman will be helpful.
For Each in Office 365
IE or Chrome?
IE v 11.0.9600.19003CO