There is some issue in the way we wrote our apps and RHEL/8. Your OOD version has no affect on this issue.
From the looks of your before.sh.erb you may have already seen these topics. I had to sprinkle in some sleep commands here and there. The last post on the MATLAB topic may be of interest too, it doesn’t have sleeps but also has eval $(dbus-launch --sh-syntax) which may be important in this context.