Regardless of it being a RAM issue or not it's still an issue.
At this point I don't understand why Apple won't fix it.
It's annoying, it uses MUCH more data (relatively speaking), it waste time, it waste battery, you lose information previously input, etc etc.
With iOS 6 I never noticed this. With iOS 7 I'd have to make it happen. With iOS 8 I notice it constantly when using Safari.
Well there you go