It's either you removed some curses that were causing you problems or blocks in your energy or your bioelectricity is higher and you got used to it. Don't worry it's still working.
Come to think of this and why I am replying I used to before the final Ritual was started get strong heat like symptoms what they called the classic Kundalini activation symptoms sometimes it would be very uncomfortable etc when I meditated too much sense the final Ritual I haven't gotten any of these symptoms at all I notice. I wonder if that was just a block in my energy or a curse of some kind. So possibly it was the same with you. I actually do kunalini yoga and meditation a lot more and don't get these symptoms so I am guessing it was something to do with enemy curses.