I don't have a Hellvape Fat Rabbit Solo.
Perhaps (maybe???) the reason you are getting leakage/seeping is because the shoulders of your wick, where they come out of the coil, are resting on the deck where the airflow is under the coil.
View attachment 1030120
And maybe, drawing excess juice to the path of least resistance, the airflow sitting under the coil???
My Atmizoo Tripod RTA has a "similar" build deck. And it's deck is very much like all the newer Kayfun RTA's.
What most of us with Kayfun's learned is to move the wick shoulders away from the airflow. And that's also what I do with my Tripod.
Like so.............. Tripod deck.......
View attachment 1030121
I use a sewing needle to move the wick away from the center block where the AF is. Moving the wick shoulders away from the center AF block I don't get any seeping/leakage with my Tripod or modern Kayfun's.
And I also have my coil about 2mm above the AF. Your second photo looks to be ~2mm above also???
Maybe try moving your wick shoulders away from the center AF block and see if that helps???
Just a thought.