So I upgraded my FreeBSD to 13.0-RELEASE this weekend, and immediately I got problems with my Linux NFS client starting to hang and go unresponsive. I am not sure if the FreeBSD release or the Linux NFS client is to blame. There are threads on reddit and FreeBSD mailing lists about users having this problem.
As FreeBSD doesn't provide bugfixes for releases, you have to wait for 13.1-RELEASE.
As FreeBSD doesn't provide bugfixes for releases, you have to wait for 13.1-RELEASE.