I’m glad you figured out what was the issue 
I’m not a PHP person, so I’ve no knowledge of “antislashes”, but from what I gather it removes backslash from the string. Which would explain why you had no issues with some pages of results, but as soon as you ran into a page with titles such as "title": "\"Hahahah ahaha I Did It hahahah\"", it would no longer be valid JSON if the backslashes were removed.