I just checkout the latest alpha. Great work.
It looks like the variable Filter for focused subprocessses is broken.
While the preceeding count call has the activityId in the filter List.
The actual variable-instance (see screen) call does not.
Thats probably why it shows the full variable List of the process even though i have a subprocess selected/focused. Should be 10 but lists 24 Variables.
Hope this helps, thanks again.