Disc looks blank after successful burn

I have added suid rigths to the wodim, but this did not help, please see the attached debug output. The disk is not usable :(

Status changed to 'Confirmed' because the bug affects multiple users.

If I create a New Data Project, the k3b work fine, it burn and say me that all is success, BUT the DVD is blank.

If I create the same data project, but ONLY create a image iso in my home, and later I burn the iso image with option "Write to Disk..." (in spanish is "Grabar en el disco..."). Then the burn is truely success.

My software:

Ubuntu 12.04 (Unity)
k3b 2.0.2

The DVD created have surface burned, but if I use it in computer, it is not detected, the DVD is not mounted.

Then I create directory and mount sr0:
sudo mkdir /media/kk
sudo mount -t iso9660 /dev/sr0 /media/kk

And the information is in, all WELL, I can read it.

What is the problem?

I am running K3b version 2.0.2 and have also epxerienced the same problem. Burnt 3 DVD+R disks; 2 of Sony brand and 1 or Moserbaer brand. All 3 have the burn visible on the disk but show as empty in the burning tools. Checked the disks on multiple computers (Windows + Linux) and same result.
I burnt an RW disk and that had no problem.

I see that it is quite an old bug. Will it be rectified soon?

k3b - DVD writing

Select Dash > Terminal >

sudo k3b

Else in Ubuntu 16.04.1 also, disc looks blank after successful burn - Brasero also same)

 I am having the same problem with Xubuntu 18.04/k3b. Burning the same iso with Xfburn works fine but k3b fails repeatedly. I have tried several changes to permissions with no success.