Registry htpasswd support not working with '$' in password

[lhenry7]

Docker Info
Containers: 4
Running: 4
Paused: 0
Stopped: 0
Images: 148
Server Version: 18.03.0-ce
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: cfd04396dc68220d1cecbe686a6cc3aa5ce3667c
runc version: 4fc53a81fb7c994640722ac585fa9ca548971871
init version: 949e6fa
Security Options:
seccomp
Profile: default
Kernel Version: 4.16.0-1.el7.elrepo.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 7.789GiB
Name: ip-10-227-81-147
ID: SHVB:UU7A:23FQ:KZ7N:2XFH:NW22:OQIR:OP7A:GYTI:HCBP:6BVY:SNOV
Docker Root Dir: /docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
dsg.infra
127.0.0.0/8
Live Restore Enabled: false

Registry config.yml
version: 0.1

storage:
filesystem:
rootdirectory: /registry
delete:
enabled: true

http:
addr: 0.0.0.0:443
tls:
certificate: /certs/my-registry.crt
key: /certs/my-registry.key

auth:
htpasswd:
realm: Registry Realm
path: /auth/htpasswd-file

log:
level: debug

I ran:
docker run --rm --entrypoint htpasswd registry:2.6 -Bbn username pass$word > /var/lib/registry/auth/htpasswd-file

Then started registry like this:
registry:
restart: always
image: registry:2.6
ports:
- 443:443
volumes:
- /var/lib/registry/conf/config.yml:/etc/docker/registry/config.yml
- /var/lib/registry/certs:/certs
- /var/lib/registry/auth:/auth

And when I do:
docker login https://localhost
Username: username
Password:
Error response from daemon: login attempt to https://localhost/v2/ failed with status: 401 Unauthorized

Recreate the htpasswd file with 'username' 'password'
and it works. Tried with 2.7 as well, same behavior