Went up to 1.5.3, works fine. Went back up to :latest, same error. Removed container from unraid and removed image, reinstalled from template, same error.
EDIT: I am running the container as custom on br0, with a static IP. Docker is set to IPvlan. Using NPM as a reverse proxy. Not sure if that makes any difference in regard to the 1.5.4 update.
Here is my catalina.out after startup, and failed connection: