I am not sure this is supposed to be happening but when I mount an AppVolume, there are many files on the C: drive. Is this expected behavior?
i was asking myself the same question during appv testing. It looks like this is expected behaviour but maybe someone else can confirm.
After a successful install the files normally clear up, they are only created as part of the installation process. If the application has been build successfully then you can remove them manually.
Thumps up if the above is helpful or tag as correct if that answers your question.