Example is not reproducible in my settings

[DrPDash]

@alsauve 1) While testing the example Nino3.4 data set, I get the following image:

This is different than the example (not reproducible) at Git

My settings:

matplotlib               3.3.4
PyWavelets               1.3.0
scaleogram               0.9.5
Python                   3.8

Please help me understand. Thanks. P. Dash