Funny, the moment you mention this is when I started getting it with Sociality.
I'm a bit stumped here, my old Qt apps were launched in the same way and used more memory, and weren't killed (SIGKILL after 120s)

Edit: you're right, I was looking at PSFreedom and apparently I used to use run-standalone.sh for that, but the mediaplayer wasn't DBus aware and doesn't crash in 2s...