With the recent status effect changes, some skill mastery node didn’t receive changes the fit the new status effects, Storm Craw is one of them with Storm Breath
Storm Breath need 15 stacks of shock to reach maximum bonus, But Shock now cap at 10 stacks.
PS : (this one is not a bug, but there is not much companion/minion spell damage increases in the Primalist passive trees (Beastmaster in particular being the specialisation for companions only provide cast speed, Druid offer a hefty amount of companion spell damage but force you to go this specialisation to get said bonus AND you limit yourself to a single companion)
Thanks you for ready this bug report and PS