[Question] MatplotlibChart cannot be a column but a row

[thinkORo]

Question

I have a simple Flet app structure with NavigationRailBar (on the left) and specific content (on the right).

In the NavigationRailBar I have a routing to different pages. These pages have a ft.Container. For one route I'd like to show a MatplotlibChart. And in best case with different buttons to interact with the app.

Good -> If I would put the MatplotlibChart as a container to the content of the main ft.Container everything works fine and the chart is shown
Good -> If I would put the MatplotlibChart as a container to a ft.Row() and then to the content of the main ft.Container everything works fine and the chart is shown as well
Not good -> If I would put the MatplotlibChart as a container to a ft.Column() and then to the content of the main ft.Container the chart isn't shown anylonger. The page is empty

In my Router class:

self.body = ft.Container()
self.body.content = self.routes["MyPageWithTheMatplotlibChart"](self)

In my specific MyPageWithTheMatplotlibChart view:

def MyPageWithTheMatplotlibChart(router):
  fig, ax = plt.subplots(figsize=(11,11))
  [...] any content for the plot
  model_container = ft.Container(MatplotlibChart(fig, expand=True))

  # good
  return model_container
  
  # good
  return ft.Row([model_container])

  # not good
  return ft.Column([model_container])

Does anyone have any idea what I'm doing wrong or observed similar behavior with MatplotlibChart or elsewhere?

Code sample

No response

Error message

No response

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• I have searched for answers to my question both in the issues and in previous discussions.