Error when traversing schema in BFS order

[vera]

Using v1.10.3, I receive an error when trying to traverse a JSON schema containing two arrays of objects in BFS order. (With bfs: false, there is no error)

test.js:

const traverse = require("@json-schema-tools/traverse").default;
const fs = require('fs');

const jsonSchema = JSON.parse(fs.readFileSync('test.json', 'utf8'));

traverse(jsonSchema, (schemaOrSubschema, _, path, parent) => {
	console.log("PATH", path);
}, { skipFirstMutation: false, bfs: true });

test.json:

{
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "object",
    "properties": {
        "titles": {
            "type": "array",
            "items": {
                "type": "object",
                "properties": {
                    "text": {
                        "type": "string"
                    },
                    "language": {
                        "type": "string"
                    }
                }
            }
        },
        "acronyms": {
            "type": "array",
            "items": {
                "type": "object",
                "properties": {
                    "text": {
                        "type": "string"
                    },
                    "language": {
                        "type": "string"
                    }
                }
            }
        }
    }
}

error output:

$ node test.js
PATH $
PATH $.properties.titles
PATH $.properties.titles.items
PATH $.properties.titles.items.properties.text
PATH $.properties.titles.items.properties.language
/home/vera/Desktop/node_modules/@json-schema-tools/traverse/build/index.js:170
            mutableSchema.properties = mutableProps_1;
                                     ^

TypeError: Cannot set properties of undefined (setting 'properties')
    at traverse (/home/vera/Desktop/node_modules/@json-schema-tools/traverse/build/index.js:170:38)
    at traverse (/home/vera/Desktop/node_modules/@json-schema-tools/traverse/build/index.js:157:43)
    at rec (/home/vera/Desktop/node_modules/@json-schema-tools/traverse/build/index.js:113:16)
    at /home/vera/Desktop/node_modules/@json-schema-tools/traverse/build/index.js:168:49
    at Array.forEach (<anonymous>)
    at traverse (/home/vera/Desktop/node_modules/@json-schema-tools/traverse/build/index.js:167:44)
    at Object.<anonymous> (/home/vera/Desktop/debug_json_schema_traverse/test.js:6:1)
    at Module._compile (node:internal/modules/cjs/loader:1126:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1180:10)
    at Module.load (node:internal/modules/cjs/loader:1004:32)