Europa Universalis IV

Europa Universalis IV

Anbennar: A Fantasy Total Conversion
Electors not backing me (current emperor) despite having the highest rating?
This isn't the case of them having another backer, they just simply vote for themselves despite me having a (in some cases much much higher) higher score. I've not seen this in base game, and it only started happening after the religious dispute resolved. Any ideas for a fix?