[v5] Assigning a value to a field no longer working

[pgfactory]

Description

Assigning a value to a field no longer working, in PHP that is.

Expected behavior
The assigned value should appear when used in a template.

To reproduce

1. Start from starterkit, paste the code below into template home.php
2. Open page in browser
3. See output that says "title: 'Home'" instead of 'XXX'

$page->title()->value = 'XXX';
$value = $page->title()->value();
echo "title: '$value'<br>\n";

$page->title()->value('XXX');
$value = $page->title()->value();
echo "title: '$value'<br>\n";

Two variants, both working in V4. The second variant is the prefered one according to https://getkirby.com/docs/reference/templates/field-methods/value

Your setup

Starterkit with Kirby 5.0.0-rc.2

[bastianallgeier]

Thanks for creating the issue @pgfactory. We already figured out why it is happening. Now we only need to figure out how to fix it :)

You wrote on Discord that you do this in a plugin. Can you tell us a bit more about what the plugin does and how you use it there?

[pgfactory]

The plugin is called "PageFactory", which sort of points at its purpose. In short, it prepares a bunch of fields for various elements in a template. The goal was to automate and make re-usable a lot of the standard solutions for problems that pop up in many websites - at least websites of a certain kind. That way, the workflow using PageFactory deviates somewhat from the "standard" one.
It would get out of proportion to explain all the hows and whys at this point. But I'd be happy to do so, should anybody be seriously interested. Actually, I had been pondering about presenting the plugin at one of the meetups. Unfortunately, there hadn't been many south of Frankfurt, yet.
The plugin is "private" as in not officially published. But again, if somebody is interested, I'm (soon) ready to publish it.