Timestamp missing from tweets with media


In an attempt to gather the different types of payloads I can expect from the streamin API, I have noticed that when I receive a tweet with a picture attached, it doesn’t have any timestamp_ms property, which is otherwise the case with any of the other tweet payloads.

Is there any specific reason for this? It would be nice for this to be consistent in regards to keeping track of if I am falling behind or not, as is mentioned under the “Falling behind” header here: https://dev.twitter.com/streaming/overview/processing.