Documents are deleted few mintutes after creation

I have an application that stores URL locations from aws into my mongodb collections which has been working fine. Suddenly documents started getting deleted without anyone dispatching the actions. I have checked but there are no TTL indexes as you can see in the image attached. What could be causing this? This is causing a big issue at the moment.

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Now the issue is this, in two new collections when:

• User A uploads their documents going to these two collections (Status All Good)
• User B uploads their documents (All of User A’s documents in these two collections are deleted and User B’s documents are retained)
• User C uploads their documents (Sometimes All of User B’s documents are deleted sometimes one is retained and only User C’s documents are retained)

What I have done:

• Created a middleware that checks document ownership preventing unauthorized deletion
• Created an audit log feature that logs all delete actions for these collections
• Checked if there exists a TTL index on either of these collections the only index is the id