Error when decoding data encoded with `bundleStrings: true`

[Kit-p]

Summary

When all the keys and values are strings of length smaller than 4, the encoded data cannot be decoded successfully with the following error.

Uncaught Error: Data read, but end of buffer not reached
    at checkedRead (./node_modules/cbor-x/dist/node.cjs:229:10)
    at Encoder.decode (./node_modules/cbor-x/dist/node.cjs:156:12)

How to reproduce

const { Encoder } = require('cbor-x');
const encoder = new Encoder({ bundleStrings: true });

const data = { abc: '<=3' };
const buf = encoder.encode(data);
encoder.decode(buf); // <-- this will produce the above error

Environment

Node.js: 22.12.0
cbor-x: 1.6.0

[Kit-p]

This line in encode.js seems to be responsible for the bug.

if (bundledStrings && strLength >= 4 && strLength < 0x400) {

Is strLength >= 4 because of the bundle reference being 4 bytes long, making strings of length shorter than 4 not worth bundling?

If that is the case, probably the root cause is the bundle being empty or even incomplete?