What's wrong with this stacked area chart?

I am a complete newbie and this is my first question on StackOverflow. I am working on the dashboard in plotly-dash, and have some issues with the stacked area chart:

While the line chart looks not that bad:

Some example data and types:

Occ_Number column is created to count how many times each or another platform appears in the dataset to use it in the chart to show video games releases by years and platforms, but I guess it is not a good decision.

g2.sort_values(
by='Year_of_Release',
ascending=True,
inplace=True)   
g2['Occ_Number'] = g2.groupby('Platform').cumcount()+1

Plotly:

 fig = px.area(g2,
        x=g2['Year_of_Release'],
        y=g2['Occ_Number'],
        color=g2['Platform'],
        color_discrete_sequence=px.colors.qualitative.Dark24,
        title="Video Games Releases By Platforms",
        labels=dict(Year_of_Release='Year of Release', Occ_Number="Number of Released Games"))

fig.update_layout(yaxis = dict(type="category")) 
fig.show()

If you have any ideas/suggestions on how it can be fixed or what data manipulation I can do to improve it I would really appreciate it!