There's already a small section on this in the descriptive text. However, I think, in the broader picture this is more about aggressive optimization and nondeterministic behavior from the high level programming language point of view. Which may happen to any product. (E.g., at some point, Safari mobile had a problem, where some code it should have fallen back to in time critical moments was apparently already purged from memory.) The point is really, if you put all eggs into a single basket/browser, what may have been a minor trifle else is elevated to a completely different level.