PDF upload does not work properly

When I use the load function, the bot sometimes sees the uploaded document and applies the prompt. But most of the time, it does not see the uploaded document, and when I submit, it asks me to upload a file.
I can still enter the chat and ask questions about the uploaded doc. It sometimes responds but mostly asks for the document upload again.

Could you provide a link to your tool? I will look into this upload issue.

https://beta.pickaxeproject.com/user/control-panel/Contracts_Assistant_UTY3Z?admin=HPG572LMOV181XM2WXLV

This is the link to control panel

It’s seeming to work for me. Though if you want continued question-and-answer on a document, I would recommend implementing the tool as a Chatbot rather than a Form.