@ChristianSchieder Hi Christian, welcome to the forum!
Please create a simple flow demonstrating the issue and paste it to a reply so we could look at it.
In order to make code readable and usable it is necessary to surround your code with three backticks (also known as a left quote or backquote ```
)
```
code goes here
```
You can edit and correct your post by clicking the pencil icon.
See this post for more details - How to share code or flow json