Poison crabs not bleeding

Was wanting to make a minion build revolving around the venomous crab matriarch using bleed as the main damage for bossing. I equipped them with the skill gym malady which is supposed to apply base poison chance to bleed instead and vice versa. I don't believe it is working in the way that i think it is, during boss fights I'm not seeing and inherent bleed working at all from the spectres. even with envenom and lacerate on they still only poison. Does anyone know if this is how it is intended to be working or if I'm doing something wrong