Vector of BytesN<4> is having trouble

Reproduce the contract.mint call using the shown Vec<BytesN<4>> canvas, then inspect node_modules/@stellar/stellar-sdk/lib/contract_spec.js at scValToNative and dist/esm/assembled-tx.js where result conversion is invoked. Done means the call no longer raises the reported type error for this vector result.

Soroban version

% soroban --version
soroban 20.2.0 (v20.0.0-rc3-125-g07dcd3c78a15f3ad0db023c3242e154443eb106a)
soroban-env 20.1.0 (36d33cb6c986c9a8a9200b7eb04cf02e2c3f0ef4)
soroban-env interface version 85899345920
stellar-xdr 20.0.2 (a928e82943e4e93c887555fdec3b1e139ad810d2)
xdr curr (bb54e505f814386a3f45172e0b7e95b7badbe969)

Relevant rust contract code (see the canvas arg)

pub fn mint(
    env: Env,
    canvas: Vec<BytesN<4>>,
    owner: Address,
    author: String,
) -> Option<Vec<BytesN<4>>> { }

The generated TS binding interface for the above contract function

const { result } = await contract.mint({
    canvas: [
        Buffer.from([226, 148, 140, 0]),
        Buffer.from([226, 148, 172, 0]),
        Buffer.from([226, 148, 172, 0]),
        Buffer.from([226, 148, 172, 0]),
        Buffer.from([226, 148, 144, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 150, 128, 0]),
        Buffer.from([226, 150, 132, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 150, 136, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 150, 128, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 150, 132, 0]),
        Buffer.from([226, 150, 128, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 148, 130, 0]),
        Buffer.from([226, 148, 180, 0]),
        Buffer.from([226, 148, 180, 0]),
        Buffer.from([226, 148, 180, 0]),
        Buffer.from([226, 148, 180, 0]),
        Buffer.from([226, 148, 180, 0]),
    ],
    owner: 'GAKZAQ5AIODB635TLYSAV7NM3TV4LCHMOBHLNY7LEHO3LWDHLK4UG6QK',
    author: 'kalepail'
})

The resulting error when running the above code

413 |               var valTypes = tuple.valueTypes();
414 |               return ((_scv$vec2 = scv.vec()) !== null && _scv$vec2 !== void 0 ? _scv$vec2 : []).map(function (elm, i) {
415 |                 return _this5.scValToNative(elm, valTypes[i]);
416 |               });
417 |             }
418 |             throw new TypeError("Type ".concat(typeDef, " was not vec, but ").concat(scv, " is"));
                        ^
TypeError: Type [object Object] was not vec, but [object Object] is
      at scValToNative (/Users/tylervanderhoeven/Desktop/kalewalk/kalewalk-sdk/node_modules/@stellar/stellar-sdk/lib/contract_spec.js:418:19)
      at funcResToNative (/Users/tylervanderhoeven/Desktop/kalewalk/kalewalk-sdk/node_modules/@stellar/stellar-sdk/lib/contract_spec.js:100:14)
      at result (/Users/tylervanderhoeven/Desktop/kalewalk/kalewalk-sdk/dist/esm/assembled-tx.js:139:20)
      at /Users/tylervanderhoeven/Desktop/kalewalk/index.ts:35:26