Fails to generate large enough chunks, leading to EntityTooSmall when completing

Code as used with the client on https://www.freecodecamp.org/news/upload-large-files-with-aws/#step-2-how-to-set-up-aws-s3-backend-with-nodejs doesn't work, because it chunks the file in to chunks that, for instance have length 5592408 encoded, but Buffer.from() turns them in to a length of 4194304 so it won't reassemble