The root cause is InferColumn API also infer a boolean column's column purpose as numeric. Which in some way makes sense as there's a direct way of mapping boolean to numeric.

While in AutoFeaturizer API, it always put a ReplacingMissingValue transformer to numeric feature. This usually works if a column has numeric type. But when it comes to boolean type, ReplacingMissingValue won't work any more as there's no Default NA value for a boolean type.

The fix for this issue is in AutoFeaturizer, check if a column with numeric purpose is boolean type or not, if it is boolean, then use ConvertType transformer instead.