Okay, first of all this aint mine, it's my brothers'. I just want to help him get it fixed. since the in-game's Bug report option is currently unavailable.
As you can see the Wrath of Gladiator Skill is gone, even though he got it from the previous season he won.
It was gone after the snow update. i mean after he update to 7.8 version which is Snow Boundaries 2018
Thats all, hope it gets fixed!
Happy Holidays!