Gluster users - Jan 2018 - performance.readdir-ahead on volume folders not showing with ls command 3.13.1-1.el7

with
   performance.readdir-ahead on
on the volume maked folders on mounts invisible to ls command but it
will show files fine
it shows folders fine with ls on bricks

what am I missing? maybe some settings are incompatible
guess over-tuning happened

vm1:/t1 /home/t1 glusterfs
defaults,_netdev,backupvolfile-server=vm2,attribute-timeout=600,entry-timeout=600,negative-timeout=600,fopen-keep-cache,use-readdirp=no,fetch-attempts=5
0 0

glusterfs.x86_64                     3.13.1-1.el7                   installed
glusterfs-api.x86_64                 3.13.1-1.el7                   installed
glusterfs-cli.x86_64                 3.13.1-1.el7                   installed
glusterfs-client-xlators.x86_64      3.13.1-1.el7                   installed
glusterfs-fuse.x86_64                3.13.1-1.el7                   installed
glusterfs-geo-replication.x86_64     3.13.1-1.el7                   installed
glusterfs-gnfs.x86_64                3.13.1-1.el7                   installed
glusterfs-libs.x86_64                3.13.1-1.el7                   installed
glusterfs-server.x86_64              3.13.1-1.el7                   installed
nfs-ganesha-gluster.x86_64           2.5.3-1.el7                    installed
python2-gluster.x86_64               3.13.1-1.el7                   installed

Options Reconfigured:
dht.force-readdirp: off
performance.force-readdirp: off
performance.client-io-threads: on
nfs.disable: on
transport.address-family: inet
server.outstanding-rpc-limit: 128
cluster.use-compound-fops: on
cluster.shd-max-threads: 12
performance.rda-cache-limit: 25MB
performance.parallel-readdir: on
performance.nl-cache-timeout: 600
performance.nl-cache: on
performance.write-behind-window-size: 16MB
performance.enable-least-priority: off
performance.cache-max-file-size: 500MB
performance.cache-refresh-timeout: 60
cluster.lookup-unhashed: auto
features.cache-invalidation: on
features.cache-invalidation-timeout: 600
performance.stat-prefetch: on
performance.cache-samba-metadata: on
performance.cache-invalidation: on
performance.md-cache-timeout: 600
network.inode-lru-limit: 90000
cluster.readdir-optimize: on
cluster.lookup-optimize: on
server.allow-insecure: on
performance.cache-size: 1GB
performance.io-thread-count: 64
client.event-threads: 8
server.event-threads: 8
cluster.read-hash-mode: 0
performance.readdir-ahead: off

-v