Last week saw FreeBSD 13.0-RC3 released as an "extra" build due to the fallout from the last minute WireGuard situation. Due to other bugs, FreeBSD 13.0-RC4 was issued today rather than going for the final release.
FreeBSD 13.0-RC4 is now the second unplanned/as-needed release candidate ahead of the big FreeBSD 13.0 debut. FreeBSD 13.0-RC4 fixes an issue with scripted installations and also has several PowerPC fixes. FreeBSD 13.0-RC4 is also rounded out by a NETMAP memory leak fix, an issue with lock-unbound and some IPv6 deployments, updated to OpenSSL 1.1.1k over its recent security issues, and other various bug fixes.