Ad complete beacons firing but not reaching servers

In our app we have events that get fired after a certain period of time when an ad is playing. These events are fired from the RAF (Roku Ads Framework) automatically. The ad start events are firing and reaching our servers reliably, however the ad complete events are inconsistently reaching our servers. Sometimes they'll go through and sometimes they wont.
Been trying to debug this for a awhile. Wanted to know if any other developers are experiencing this issue.