Per documentation, Console maintains a list of the last 500 requests that were successfully executed by Elasticsearch. The history is available by clicking the clock icon on the top right side of the window.
Am not sure if AWS changed any of their internal APIs. It sounds like probably the reindex takes a long time and it's only added after a successful request. This sounds like a bug to me..
Can you please open a bug in Dev tools and label it traige needed, we will investigate further.