The original download of Propel, (build number 2025.2.0.2512031955) on the website has a bug in the system memory IP that impacts Mach-XO4 designs.
This problem has been fixed in a new release of Propel 2025.2 (build number 2025.2.0.2512111315) that is currently available for download from the Propel webpage: https://www.latticesemi.com/LatticePropel
Propel versions that were installed before December 16, 2025 are impacted. Customers that are using Propel 2025.2 to design for Mach-XO4 are advised to download the new release of Propel 2025.2.