Service memory (laundry) keeps growing

I have the same issue as decribed in the following thread:

https://www.ixsystems.com/community/threads/memory-leak-sucking-up-all-ram.84090/

Summary:
-Running one jail with minidlna, three mounts to local datastes
-When a movie is viewed from the minidlna server the usage of service-memory is increasing. Starts after reboot with 1.5 GB and grows to almost all internal memory. At the same time ARC is decreasing.