Was testing various pool options creating/disconnecting many iterations then testing with iSCSI target device. Noticed could not use same name so changed the name. Later discovered on client when using iscsiadmin command to list connection devices, the whole list of iSCSI devices that no longer existed on TrueNAS still show up as live devices. They can be logged into and show up though cannot write data to them.
This persists through restart. The boot up screen lists those deviced though also indicate no luns attached.
Something is not happening when the pool is deleted or the iSCSI target is directly deleted and need cleaned up.
I marked this high as you can work around it it but not ready for production when a lot of confusion can happen as deletion is not quit clean.