You positively have Malta Black there,but ,splitting is something ,it did from climate problem now in Oct,or from something you did,ex :Watering too much.
Rest assured that if you plant in ground,and grow to be an adult tree, getting ripe fruits when it needs to,I mean in August and Sept,then it will never split.
It is one of the list splitting figs here in NJ,despite heavy rain in the wrong time,yet my tree is adult and in ground.
I do nothing to it,except Thinning, giving a little limestone in the Spring,and yes,I never water ,this one.
Edit Note:In your climate that fig should be in ground!