The solution to such an issue.
A.
4.2.5, 4.3 + 4.3.5 Patch Notes (Nintendo Switch)
B.
My bad… My math is based off skulls and Doom skulls on the board as well. By now I forgot that it can explode 9 gems but skulls and overlap I only think of it as 6 Mana gems. Experience has altered my perception that I forgot how it’s “intended” to work.