If you think about quantum mechanics, it's something that could sure look like a bug. Systems that you expect to be deterministic are stochastic if you look closely enough? If it were a program I was writing, I'd start wondering if there were rounding errors and/or concurrency issues. But we've come up with math to understand it.
Math is very general, I'm not sure there's a process that you couldn't describe with a complex enough mathematical system, and thereby conclude it had it's origins outside of our universe.