Iron Daemon Force Melee and Firing Bug

Total War Warhammer III Immortal Empires, Chaos Dwarf DLC, basically a video bug report.
So someone told me artillery can either force melee attack or fire at an area but not both. Well, Iron Daemons can do NEITHER, and I'm pretty sure that's a bug as of Patch 3.1. Other chaos dwarf artillery can fire at an area, yes. But the Iron Daemons can't fire at an area anyway, so losing Force Melee Attack for a super-chariot unit is very painful.