Having difficulty using CGroup to match process

[rexendevar]

I'm trying to modify the parameters for processes depending on the control group and it doesn't seem to work. Here's a snippet of the config.kdl:

        recording nice=-9 io=(best-effort)0 {
            "/home/spyndling/opt/REAPER/reaper"
            include cgroup="/user.slice/*x2dreaper*"
        }

This is to also catch Yabridge processes which host Windows audio plugins, in addition to the application itself. Here is some info about a Yabridge process that is not being scheduled correctly:

(Apologies for the ultrawide image, it wouldn't let me copy paste)

What am I doing wrong here? Thank you