Chat gpt reading documents bug

I’ve been trying to upload and read PDF files using my ChatGPT plus account, but it’s not working as expected. The PDF upload seems fine, but ChatGPT gives wrong output , for example i gave him physics the output is about economy. I wanted to check if anyone else is facing the same issue.

Is this a general bug, or is there a solution/workaround for this? Would appreciate any insights or help!