When I leave my 2011 MBP in Idle or power nap for a while, the TS3 client is using like 12GB of RAM. The longer I leave it unused, the more RAM it consumes until the system runs out of memory.

System Configuration:
OSX 10.9.2
Memory: 16 GB

It is constantly reproducable on my machine. I unfortunately cannot provide any logs, as they are none written.