Filters don't have values in the analysis whereas the copy of the same analysis has values

I have several filters like country, organization type, topic/action, status which takes values from a .parquet file from S3 through Athena schema.
The filters correctly took the available values in the analysis and dashboard. But after about three weeks I saw the values are not being caught in the filters.

I took the backup (copy) of the analysis (nothing changed) already. When I check this in the copy, those values are available.
I compared those two analysis quite a lot of times. But still its the same.

I cannot even re-publish or override the dashboard from the copy of the analysis. I need to publish it to a new dashboard.

Is this an issue in quicksight? or any workaround available?

Thanks!

@piriya what do you mean by values are not being caught in the filters ?