Hello ! I'm on Fedora Linux version 36 X64 bit. I'm already installed k3d from dnf package manager since I was on Fedora 24. Yesterday, I suffered from unusual bug ! I tried to copy a DVD disk from my laptop DVD room to external DVD room. The problem is that copy process (writing) process go okay without any problem. k3b was able to read from source without any problem. There was no any error message in copy process & no malfunction neither in my laptop DVD room nor in my external DVD room ! I tried to change DVD disks, so tried again with other source DVD & other blank DVD with same problem ! After writing completed, k3b could not start verification process at all & remain infinitely so till I canceled the process ! I took my laptop & external DVD room (which is blue ray supported from Lenovo) with 2 DVD sources (non-blue ray) & 2 blanks DVD (non-blue ray) to laptop expert & CD/DVD experts & both of them pointed to software problem not hardware problem. There was no such problem when I was on Fedora previous versions !! I found this bug about similar issue if not same issue, but marked as "Resolved/Unmaintained" Note: I do not use "create image" option, but there was no such problem before !