The delivery service assigns the overall message timestamp to a data point with an invalid timestamp

This was deliberately coded in, but on reflection may not be the correct action.

If data point has a timestamp it probably means that data was not collected at the message time so giving the message timestamp is an error. It could be better to discard the data point.

Start by locating the delivery service logic that assigns the overall message timestamp to data points with invalid timestamps. Determine the intended behavior for data collected at a different time, then confirm whether invalid data points should be discarded before proposing a change.

Written by the indexing model from the issue text.