Restart behavior seems faulty - Logstash 6.0.0

[PixelatedFigure]

I put on a topic on Elastic.co for this, but I'm creating an issue here because I believe this is a bug.

You can see the topic here:
https://discuss.elastic.co/t/elasticsearch-input-plugin-for-logstash-6-0-0-issue-indexing-data/110054

In brief, while the input plugin is trying to retrieve data from an index that doesn't exist, it keeps on giving a 404 error, but once there is data on that index, it doesn't give the error anymore, though it doesn't get the data or does anything.
Once I restart Logstash with the data existing in the ES index, it gets the data and transforms it into whatever I want it to be, so I believe the plugin does not restart properly.