So today I was killing Rev's for a solid 2 hours and finally teleported home. after resupplying I teleported back to south entrance of Rev Cave and ran north to the agility shortcut and realized I couldn't use it! I've been a maxed account since the dawn of time, so it's not that my level isn't 99. My Agility level was lowered to 70.
After coming back home, I immediately tried summer pies. I have hundreds and ate one. It healed me back to 99 HP, but did not effect my Agility level at all.
In OSRS, Summer Pie's are supposed to increase your agility by 5 temporarily. If you are under level 5, it acts like food with your HP: it'll rais it in intervals of 5 till it reaches your Agility Level, then 5 above.
My suggestion is to simply make Summer Pie's function the same as in OSRS.