This is a strange issue and shouldn't be occurring. In order to ensure that this issue is being caused by our views plugin I would recommend that you temporarily disable all your non-toolset plugins and try again.
I dont even want to start a support thread - I am actually getting very tired of Views.
I think there is ALWAYS something that doesn't work, and somethings that should be done in a very unpractical and non-logical way.
I am starting to code everything myself, because it is ALOT LESS frustrating and faster instead of constantly asking for support. - unfortunately i had to open a new ticket because of a project that already uses WP-Types.
It was clearly a bug, that caused error on page rendering if i added a class to a element inside a foreach loop.
I dont want to waste anymore time on this issue to be honest, as i was forced to javascript my way out of it (very unprofessional solution, but it works).
Thank you as always for your support, but i have just come to that point where i am starting to give up.
Can you paste here the exact change that causes this entire thing to fail?
In the original description, you said that it's adding a class. It would be great if you can paste two codes:
1. Working
2. Not working, with minimal change to cause it not to work
And, if the output just stops, there should be a PHP error in the log file. Can you check that error and tell us what it is?