We've recently updated our stack to 7.2, before the update our logstash indices were named something like "logstash-2019.03.07" by default. There's nothing in our configuration as far as I'm aware that defines this name, so it was the default logstash/ES behaviour. After updating everything(including logstash) to 7.2, the newly created indices are all collected under an index named "logstash", without the date. This broke our index pattern ("logstash-*") and I'm suspecting that not having multiple indices per each day is also slowing down searches considerably or giving time-outs by having a lot of data under the same index, though I may be wrong. My question is, has anything changed in regards to the default index naming behaviour in 7.x? Any idea why this happened?