2019.1 was released briefly toward the end of October but pulled from distribution about November 2nd (going from memory).  Historically this happens if they find critical issues with the update. The last couple times this happened, the next/fixed update was released about a month later but w/Autodesk University coming up next week and new product releases getting finalized for release 1st quarter of 2019, I wouldn't be surprised if it was later.

I've wrote about it in a little more detail here...

http://www.darrenjyoung.com/2018/10/30/fabrication-sp-2019-1-2018-3/