Excluding purposives, there are imperatives with come and go which may qualify as serials depending on the very precise definition adopted. It seems that there is always a slight rise then a fall for each verb in such sequences, even if the rise on the second or subsequent verb starts at a slightly lower than the preceding one. However, it must be acknowledged that this is merely an overriding impression. A detailed study of this is needed with appropriate sophisticated equipment in order to resolve this question.
If it is right that restriction to imperatives has its origin in Bhojpuri, it is nevertheless the case that these are not limited to people of an Indo-Mauritian background today.