Symbols distorting in Sketch3

Question

I'm having an issue with one particular symbol that "distorts" itself whenever I place it on an artboard (or into another symbol). So the symbol in question is called "Arrow Froward" looks like this.

However, when placed the rectangle at the bottom becomes distorted.

I've tried quitting Sketch, I've messed around with that rectangle at the bottom, and I can change how it looks on the artboard by making it larger or smaller but I haven't been able to get it to line up and look exactly as it does in the symbol. All other symbols are working normally.

Answer 1

I just figured this out: turns out my symbol instance was distorted. The symbol itself is 33x33 but the instance was like 35x47. I brought it to the correct ratio and it looks fine.