Multiplying Squalls + Siege Ballista bug (Stormweaver Ascendancy)

Multiplying Squalls is supposed to add +2 to limit for elemental skills.

Siege Ballista is an elemental skill, has "fire" tag (elemental), and "Limit 1 totem" stat, however it doesn't get increased to +3 totem limit with multiplying squalls allocated as it should.