Is saltLength broken? Examples attached

[xgiovio]

async function argon2(password){ try{ return await a2.hash(password.normalize("NFD"), { type: a2.argon2id, //hybrid memoryCost: 2 ** 16, //64MB per thread hashLength: 32, timeCost:10, parallelism:4, saltLength:32, raw: false }); }catch(err){ return null; } }

output has always 16 bytes random salt:

$argon2id$v=19$m=65536,t=10,p=4$oJZM5QTIRFsTy7tJgcrDHQ$JUtK3qlr7MmQZ54dSiPJhxJtux+u7W+DTZ3pvblyGzE

it however gives the correct output if i input {salt:randomValuesHere} in the object.

I would like to understand:

1. Why the example above is not working correctly?
2. What happens it i supply salt and saltLenght at the same? And what if saltLength is different in specified size from the salt input

Thanks