Some points understood; could you please let us know the others, too ?
Jailbreak ?
What pages ?
Lots on different tabs ?
Did you deleted all cache data from Safari once ?
Lots of other programs at the same time ?
Can you go to setting -> about ->diagnostic and give some more hints ?
"MobileSafari" and "low memory" could be interessting
My guess is still in area if memory shortage. The 32GB you mentioned is not the relevant one; I mean real RAM.
One try also: deleted all Safari caches, restart iPadand let us know if any better situation comes.