`absolute_url` fails silently when `permalink` is defined

[S0AndS0]

Describe the bug

When post.id is undefined, the post.url filtered through absolute_url should be used. Branching via if/else functions as intended, however, for unknown reasons the absolute_url Jekyll filter is failing to produce a full URL. Instead only the collection name and post slug survives.

This seems to be some kind of bug that is triggered when permalink is defined/configured.

---

Example Setup

_config.yml (snip)

url: 'https://liquid-utilities.github.io'

collections_dir: documentation
collections:
  example-collection:
    output: true
    permalink: /:collection/:name/

---

_layout/test-absolute-url.html

{% assign collection__data = collection[page.collection_name] %}
{% for post in collection__data %}
  URL: {{ post.url | absolute_url }}
{% endfor %}

---

documentation/_exapmple-collection/test-absolute-url.md

---
layout: post
title: Tests Absolute URL Filter
description: Example post that collection layout will fail to parse URL for
---

---

example-collection.html

---
layout: test-absolute-url
collection_name: example-collection
---

---

Example Results

Build then navigate to example-collection URL similar to; https://<acount>.github.io/<project>/example-collection.html

Output will likely be presented similar to...

URL: /example-collection/test-absolute-url

---

Expected Behavior

Output should be presented similar to...

URL: https://<acount>.github.io/<project>/example-collection/test-absolute-url

... this is what feed-atom and feed-rss2 layouts from liquid-utilities achieve, and there doesn't appear to be any major differences in how post.url is filtered by absolute_url