Kats, a kit to analyze time series data, a lightweight, easy-to-use, generalizable, and extendable framework to perform time series analysis, from understanding the key statistics and characteristics, detecting change points and anomalies, to forecasting future trends.
When you try to plot (https://github.com/facebookresearch/Kats/blob/main/kats/utils/decomposition.py) it's overlapping the on the ax[0] the original data with the trend, this leaves an empty subplot. This is caused due to in the zip is not considered that it should start from ax[1] onwards
This logic should be reconsidered: