Can't open some nodes


On a page I’m building, I have a very strange error.
Some nodes I can’t open anymore. It’s just hanging, but in the edit mode I’m getting all the data.


but edit is working:

Can somebody help me finding the problem?

In the drupal log I can’t see any error and the when I start the debug mode in chrome I’m also getting no data when starting the 274 node without /edit.

Drupal version: