Uploaded file hidden by default

Nextcloud version (eg, 20.0.5): 26.0.1
Operating system and version (eg, Ubuntu 20.04): Ubuntu 22.04.2 LTS
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.52
PHP version (eg, 7.4): PHP 8.1`

The issue you are facing:
Two copies of the same file hidden by default, both copies sourced from different places, so it’s the same book but not the exact same file. I’ve tried uploading through the web ui. The tried copying it into a synced folder. Both ways default to hidden. Other files upload and are not hidden.

I’m an idiot. the file name started with . (.NET) and therefore was hidden on a linux filesystem.

Thank you!

Could have happened to anyone.

Btw: there’s an option to show hidden files in the Nextcloud Files Web UI. I think it’s just under Settings in the left side bar footer.