Not enogh info to help you.
which dashboard node?
how is it configured?
Maybe export an example flow with data in an inject node, so we can see the issue.
In order to make code readable and usable on the forum it is necessary to surround your code with three backticks (also known as a left quote or backquote ```
)
```
code goes here
```
See this post for more details - How to share code or flow json