Indeed, thank you. I actually found a bug there, I was suspecting a custom code snippet, but it was not.
Because of the large number of results, the image parser ran out of memory. It should have not happened in the first place, because it should only execute on the currently viewed results, and nothing else – however it was trying to resolve over 3000 items at once, causing the PHP thread to fail.
I have corrected this in the code editor, now it should be okay. I will make sure to incluide this is the upcoming release.