I tried installing bind916 on 12.1-RELEASE, but starting it failed with:
ld-elf.so.1: /usr/local/lib/libjson-c.so.5: version JSONC_0.14 required by
How did you try to install bind916 ? If you are using ports, are all your installed ports up-to-date ? If you are using binary packages, did you run pkg upgrade ?
I tried to reproduce this, but could not.