RUM report query

Hi Team


We have configured RUM for mobile application in BSM . We are monitoring android apk through RUm . we are having below query related to session summary report . Pl help to answer the same

most of the times we see latency zero . Why we dont see latency value ? is it shown when we have sniffer probe ?

We see unavailable action count . Where we can see detail . We want to drill down unavailable actions. . Also does unavailable action inclusive of error event ?