(Magic) Consistent crash on selecting Flame Shock effects tab

[Rimaka94]

Issue Description:
Testing on water magic branch which should be up to date with all other magic, there's a consistent issue with crashing when selecting the Effects tab of Flame Shock.

(EXCEPTION_ACCESS_VIOLATION)

Stack Trace:
1 ck3.exe (function-name not available) (+ 0)
2 ck3.exe (function-name not available) (+ 0)
3 ck3.exe (function-name not available) (+ 0)
4 ck3.exe (function-name not available) (+ 0)
5 ck3.exe (function-name not available) (+ 0)
...

How To Reproduce:
add_elemental_fire_magic_lifestyle_xp 30000 > learn flame shock > select any target > spellbook > select Flame Shock > select Effects tab > crash everytime

Screenshots:

Game Files: