The in-src driver for if_re seems to have some problems, see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=166724 and https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208205.
The vendor driver, which exist as a port, seems to fix all/most of that.
Mention the vendor driver in the man page to increase the chance of someone like me finding it.