Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
Before starting with this article, it is assumed the user with the issue has:

The user opens a blank dossier and adds data.

The whole padding of that particular visualization automatically gets formatted in a very unusual way.
The technology team is aware of this, and it has been reported this comes due mstrWeb getting an incorrect locale resolution result. Currently the team is working on providing a fix regarding the issue in a future update.
For the current times if you are presenting this behavior there are workarounds available:


This is showcasing the fix for Spanish, and the equivalent instructions should be applied for any other language having the issue.
Language: (your language)
Metadata: Default
Data: Default
Number and Date Format: (your language)
Intelligence Server: (your language)
Measurement Units: Default
Time Zone: Default