Crossfaction raiding opposite faction party members hostile

Yes, you've all heard it before. When enabling crossfaction on mangos zero, one faction can't heal the other in a different group of the raid. I found this https://www.getmangos.eu/bug-tracker/mangos-zero/Crossfaction-raiding-r890/

Does anyone know the best way to solve this issue? If it has been solved before, please point me in that direction!

Thanks in advance.

Note: Since it's possible inside a party, can't we move that function to raid?