Using a connection which uses Role SYSADMIN who owns the Named Internal Stage, I used SnowCLI to upload files using SnowCLI 2.7.0 on Windows 10, with success/no error, but the files were not visible to SYSADMIN in Snowsight

I used:
snow stage copy --overwrite project1.zip @schema.ST_SNOWPARK
and
snow snowpark package upload --file="project2.zip" --stage="@schema.ST_SNOWPARK"

but to SYSADMIN (and ACCOUNTADMIN), these files were not visible in the stage in Snowsight

The command snow stage list-files @schema.ST_SNOWPARK confirmed these files were present, in addition to correctly displaying other files manually uploaded and visible in the same stage in Snowsight

What could be the cause?