MongoDB data loss

I'm using MongoDb Atlas M0 Cluster for this project. It begin when I add a few user and do some testing. I add a few users. but I notice that I'm losing the users. Somehow the MongoDb data got reset. It left me with user collection but no user inside.
Anyone have the same issue? Or anyone know why this happen?

The payload names no source file, test, or entry point. Begin by reproducing the reported MongoDB Atlas M0 user loss and reviewing the project's MongoDB integration; done requires identifying whether the project causes the reset and documenting a verified fix or ruling the project out.

Written by the indexing model from the issue text.