I also have this problem. Has anyone else found a solution? (Beyond what is already suggested) I note that I have an additional issue, where the keypad sometimes does not type in real time (ie what appears on screen is delayed, including the keys showing activation).
I'm sure the keypad issue must be low memory, but the reload issue seems suspect. Why don't sites I'm signed onto keep me signed on after reload? I can close tabs on my desktop and reopen them and I'm still signed on. I have been logged out of sites in Safari while STILL browsing the page I'm logged onto (ie I haven't switched tabs, it just suddenly changes my sign in). If I change tabs, this is a guaranteed log out and the other tab always reloads, even if I change only for 1 sec of time and then switch back.
Edit: forgot to say, yes, I'm aware of the "keep me signed in" button. It signs you out regardless.
My ipad mini is the only device I have where this happens. I understand that things must be loaded in memory to run, but seriously, this is 2015, if 1GB is so little you can't even run a browser with more than 1 tab, what is Apple doing? They are sitting on more money than the value of the Russian stock market, maybe they should invest that into a little more RAM and make their products useable. My device is less than 2 years old, do they have zero QC and can't even run a simple future proof analysis?