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Plotly in Colab -> Data in charts gets blank after some time

When initially showed it looks like this:

After some time it looks like this:

When using code like this (this is one of charts showed):

    import as px
    from plotly.offline import iplot
    for col in char_cols[5:]:
        fig = px.scatter(TRAIN[TRAIN['pojemność dysku (gb)'] < 5000].fillna(value='NaN'), 
                        x='taktowanie bazowe procesora (ghz)', 
                        y='pojemność dysku (gb)', 

My version:4.4.1

Also, my understanding was that OFFLINE plot should be downableable to offline jupyter notebook. But then everything is blank: