After latest updates it always enables thick skin prayer, even when you turn it off. Also the inventory menu always shows +1. I've selected 8 overload, 19 absorb and 1 rock cake (no spec weapon), and it showed 29, instead of 28. Script also seems to not move mouse out of screen anymore, it stays on the rapid heal.
Can't use absorb method, because it won't disable thick skin prayer!
QUICK FIX: For people who are experiencing, in the menu enable a prayer which you can't use yet. It won't enable thick skin, nor the other prayer.