SQL restores - still single threaded?

I have had issues in the past with SQL database restores, I run my backups with multiple child jobs, but I have found when I restore that I have to run as a single thread. This means that a backup of 4 child jobs, each taking an hour, backs up in one hour, but restores in four.

To allow for faster restores, we have set up SQL backup directly to disk,and restore from there. We make backups of these flat files for DR purposes.

I am currently on 7.6.0.4 - does anyone know if this issue remains in the newer versions of NetBackup? 7.6.1 or 7.7?