@ptrblck I ended up flattening the inner list of each sequence before padding and that seems to work.
[[1, 2, 2, 1, 2, 2, 3, 4], [8, 9, 10], [1, 2, 2, 3, 4, 1, 2, 2, 5, 6, 7]]

Since, the order is maintained within each customer’s sequence. Any thoughts?