Because Epic didn't bother making an announcement for us. Oh well.
The bugs that are expected to be fixed in this patch:
Husks can damage the objective through the walls in deliver the bomb mission Toggle harvesting tool button is not working on console devices .
Current bugs that are yet to be fixed:
Expected upcoming content:
- Wildlife being added in STW (aka boars, raptors, crows, wolves, etc)
Source: https://www.reddit.com/r/FORTnITE/comments/shlopt/patch_v1920_is_deploying_soon_downtime_will_begin/