code-cell caption meta with eval or glue directive

[mfouesneau]

Describe the bug

context

I define a code-cell as follows

---
caption: |
      here is a long caption with variables {eval}`n_sources`.  and some more text
name: fig_name
tags: "[hide-input]"
---
# code to generate a figure 
pass

expectation
I expected the eval (or glue) to be evaluated as it is for a code-block

bug
But instead, it seems to understand the directive but not doing the right operation
I do not have any error message, but the caption breaks the line:

n_sources
.  and some more text

No additional information from the console

problem
This is a problem for doing a figure with a dynamic caption.

Maybe there is a difference manner to achieve a similar output?

Reproduce the bug

write a md file with the above content, compile and serve.

List your environment

Jupyter Book      : 1.0.3
External ToC      : 1.0.1
MyST-Parser       : 2.0.0
MyST-NB           : 1.1.2
Sphinx Book Theme : 1.1.3
Jupyter-Cache     : 1.0.1
NbClient          : 0.10.2