ChatGPT Isn't Generating The Correct Responses When I Upload a PDF file

So I’ve recently noticed that when I try to upload a pdf file and I ask ChatGPT to do certain tasks to generate a response, the responses it provides are nowhere close to what I asked and it even says that the documents are COMPLETELY different or just gives me nonrelevant information that was never asked for. A friend of mine using the paid monthly subscription isn’t having this issue and they aren’t having this issue.