Hello! This could be caused due to a variety of reasons, you might be using a query that is filtering out the leaderboard entry. Could you perhaps demonstrate your code through Discord and I could take a look?
I wrote 2 problems so I am not sure about which one did you reply to... but I solved both of them so here are changes...
1. Showing 0th
- Uploading a new score and get entries at the same time caused the problem.
- After changing to get entries after finishing uploading a new score fixed the problem
2. Uploading entry data failure
- Change to advanced leaderboard fixed it