### Steps to reproduce

1. Open list with tasks that have files attached.
2. Go to a task with attached file(s); open info panel, Begin of the insertionthenEnd of the insertion Begin of the deletion thanEnd of the deletion "Files"
3. Open filter settings, remove all existing filters; create new filter: "Name of attached file" - "Contains" - $any letter contained in the files you see in the Begin of the insertion_Files_ tabEnd of the insertion Begin of the deletion info panelEnd of the deletion
4. Task list is filtered, but without showing any results.  --> see screenshot Begin of the insertionattachedEnd of the insertion Begin of the deletion attached End of the deletion

### What is the buggy behavior?

* Filter doesn't work as expected.

### What is the expected behavior?

* Task list should show all tasks, that match the filter: e.g. "Name of attached file" - "Contains" - "." should basically create a list of all tasks, that have attached files of any type.

### Begin of the deletion Important note

_Please note that unless you are a contributor to OpenProject, you can no longer edit this bug report after saving. You can still add new comments, but no longer add any new images or other attachments. Please make sure that all necessary information and attachments are added, and the following attributes are set:_

### **Logs**

_Are there errors in the browser console? (_[_Click here for information on how to open your browser's console_](https://webmasters.stackexchange.com/a/77337)_) For a local installation: Are there relevant logs output by_ `_openproject logs_` _(packaged installation) (_[_click here for details_](https://docs.openproject.org/installation-and-operations/operation/monitoring/#show-logs)_) or in a log/production.log or /var/log/openproject/ ? Please attach error output in these log files if applicable_

###End of the deletion Screenshots and other files Begin of the insertion

<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/attachments/40630/Screenshot_Bug_file_filter.jpg"></div></figure>

End of the insertion Begin of the deletion



End of the deletion ### Environment information

Begin of the deletion _Please check and fill out the following details to help us identify in what versions and distributions of OpenProject the error occurs_

End of the deletion **OpenProject installation type**

* [x] Hosted cloud edition
* [ ] Packaged installation
* What distribution?
* [ ] Docker All-in-one container
* [ ] Docker-compose installation
* [ ] Other (please specify) Begin of the deletion

**OpenProject version**

_If you&#39;re not running on the cloud edition, please specify the version of OpenProject you&#39;re running. Example: v12.1.5_End of the deletion

**Browser**

* [ ] Chrome
* [x] Firefox (102.4.0esr)
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Language**

Browser and OpenProject language: German