need clarity on data in data feed

Hi Folks,

Currently, I am working on one problem statement where in my organization we have suddenly started getting drop in visits for a specific segment from a specific date for one of the mobile app.

We have the adobe mobile SDK integrated into the app to capture the data in adobe analytics, and we completely rely on processing rules to process the context variables, then further store the data in traffic or conversion variables.

Now, for the initial problem statement in hand, The first step was to be sure that the segment which is applied to pull out the report has some logical change because of visit might have been dropped. 

The segment is pretty straightforward, it only applies the filter on one traffic variable containing the value specific to the app name.

Hence, I just started doing research on the traffic variable which is used in segment conditions. To find that is there any scenario where the value of this traffic variable is missing.

We also have a data warehouse that stores the raw data from adobe analytics data feeds. I just applied a query on the data warehouse where the traffic variable value is null and the page contains the value which we are passing in the app SDK. there are a few hits that I got from the query in a data warehouse.

My observations from the data feed data are that there are records where the page name value is populated along with the time stamp, post_visId_high, and post_visid_low; except these all others fields are null for these records.

In fact, the following fields are also null or 0. Ideally, these fields are managed by SDK itself, or managed on adobe analytics server.

visit_num
First_Hit_Time_gmt
visit_page_num
page_event
os_id
language_id
post_mobilelaunchnumber

Just want to understand, is there any possibility where that any misconfiguration in processing rules logic can lead to these kinds of records in data feeds?

Thanks,

Nitesh