Hi @Wimajo15, thanks for taking the time to report this! Unfortunately this Wikimedia Phabricator task lacks some information.
If you have time and can still reproduce the situation: Please add a more complete description to this task. That should be

• a clear and complete list of exact steps to reproduce the situation, step by step, so that nobody needs to guess or interpret how you performed each step,
• what happens after performing these steps to reproduce,
• what you expected to happen instead,
• a full link to a web address where the issue can be seen,
• the web browser(s) and web browser version(s) that you tested.

In some situations it can also be helpful to know if you see the same behavior when you are not logged in, and your exact MediaWiki version (if it is not on a Wikimedia website) which is shown on Special:Version, and your exact PHP version, etc.

You can edit the task description by clicking Edit Task. Ideally, a good description should allow any other person to follow these steps (without having to interpret steps) and see the same results. Problems that others can reproduce can get fixed faster. Thanks again!

The description is incomplete. Please fill in the following sections:

What happens?:

What should have happened instead?: