I suddenly realized that it is because it is trying to login to the second target I had on NAS, not sure how that got created I have only one lun there.
After
sudo iscsiadm --m node -T iqn.2011-08.com.asustor:as5304t-8d33b5.target001 -p 172.17.0.1:3260 -o delete
and reboot, everything is awesome now, no delays