PQ Visualization not accurate

[elasticmachine]

Original comment by @ycombinator:

Refer to LINK REDACTED for details.

Notice the three highlighted stats in the chart.

• Events Received, in the summary bar, corresponds to logstash_stats.events.in in the latest doc in .monitoring-logstash-*,
• Events Emitted, in the summary bar, corresponds to logstash_stats.events.out in the latest doc in .monitoring-logstash-*, and
• Events Queued, below the PQ chart, corresponds to logstash_stats.queue.events_count in the latest doc in .monitoring-logstash-*

This indicates that the UI is rendering the data from the Logstash Monitoring indices correctly. So now the question is why there is a discrepancy in the numbers within the document. Specifically, the difference between logstash_stats.events.in and logstash_stats.events.out is 14783855 - 14556475 = 227380 (~227k). However, the value of logstash_stats.queue.events_count is much much larger, 3569983 (~3.5m). Shouldn't it be the other way around, where the difference between Events In and Out is at least as large as the number of events in the Queue?