Plotly wrong subplot format

I have faced a problem with wrong format of one of the subplots using Plotly.

Problem with MonthlyCharges_Category, which has format of

['starter', 'standard', 'advanced']Categories (3, object): ['starter'< 'standard'< 'advanced']

But for some reason the graph build code takes numeric values somehow. For TotalCharges_category it's okay for some reason.

Target_col = "Target"nrows = (len(data.columns) - 1) // 4 + 1ncols = min(len(data.columns), 4)fig = make_subplots(rows=nrows, cols=ncols, subplot_titles=data.columns.drop(target_col), vertical_spacing=0.1)for i, col in enumerate(data.columns.drop(target_col)):    row = i // ncols + 1    col = i % ncols + 1    trace1 = go.Histogram(x=data[data[target_col] == 0][data.columns[i]], name="0", marker_color='blue',\                          opacity=0.5, showlegend=False)    trace2 = go.Histogram(x=data[data[target_col] == 1][data.columns[i]], name="1", marker_color='red', opacity=0.5,\                         showlegend=False)    fig.add_trace(trace1, row=row, col=col)    fig.add_trace(trace2, row=row, col=col)    fig.update_xaxes(row=row, col=col, title_font=dict(size=12), tickfont=dict(size=10))    fig.update_traces(showlegend=False, selector=dict(type='histogram'))fig.update_layout(height=1200, width=1000, title_text="Class Balance")fig.show()

I have tried few ways to get rid (checking values, format of column etc), but nothing helps.

Thanks in advance.

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Structure of data looks something like this with different columns with 2-3 categorical options.I delete column which has float values 'MonthlyCharges' as well before the plotting.

printing out MonthlyCharges_category gives

0        starter1       standard2       standard3       standard4       advanced          ...   7038    advanced7039    advanced7040     starter7041    advanced7042    advancedName: MonthlyCharges_category, Length: 7043, dtype: categoryCategories (4, object): ['no'< 'starter'< 'standard'< 'advanced']