Expected to be released in early November via BIOS updates from all mobo manufacturers, the new CPU microcode is said to bring needed fixes, stability improvements and even new features to all Ryzen 3000 processors, as well as to the older 1000 / 2000-series.
https://www.notebookcheck.net/AMD-Ryzen-CPUs-to-get-microcode-update-with-100-improvements-this-November.436895.0.html