Joomla recently released version 3.9.1 of their awardwinning platform.
This is a bugfix to Joomla 3.9.0 which we upgraded all sites to earlier this in November.
We have a number of customer sites on Joomla 3.x, and within hours of this release we had upgraded all affected portals accordingly.
More info on this release on: https://goo.gl/J7CCvK