WDIO can not mock error response with status code 422, 0

Question

The mock request just hangs forever if I tried to mock a failed response. If mock doesn't provide a way to mimic error response. Any alternative?

            sampleMock = browser.mock('**/create',{
                method: 'post'
            })
            sampleMock.respond(null, {
                // 0, 422 will cause request hanging. 404 works. So odd~
                statusCode: 422
            });

Environment (please complete the following information):

wdio 6 chrome 86