All images gone !!

 I have a customer who just experienced that after editing an article - just the text - then all images in showtime image gallery, attached to that article are gone !!! That is a very serious bug ! I have now asked the hosting to roll back the site to yesterday, but this needs fixing asap.

I have now raised the php param max_input_vars from 5000 to 20000 - could that be the cause of the problem ?

Another thing: On the site there are custom fields attached to a parent article category. When you create an article in a sub category it works, but when you then afterwards move the article into anothe sub category (under the same parent category) - then alle images are gone ???

Today the customer gets this error when changing a category on an article:

An error has occurred.

0 Attempt to assign property "title" on bool

Call stack
# Function Location
1 () JROOT/plugins/fields/showtime/fields/showtime.php:57
2 JFormFieldShowtime->getInput() JROOT/libraries/src/Form/FormField.php:1029
3 Joomla\CMS\Form\FormField->renderField() JROOT/layouts/joomla/edit/fieldset.php:43
4 include() JROOT/libraries/src/Layout/FileLayout.php:128
5 Joomla\CMS\Layout\FileLayout->render() JROOT/libraries/src/Layout/LayoutHelper.php:76
6 Joomla\CMS\Layout\LayoutHelper::render() JROOT/layouts/joomla/edit/params.php:170
7 include() JROOT/libraries/src/Layout/FileLayout.php:128
8 Joomla\CMS\Layout\FileLayout->render() JROOT/libraries/src/Layout/LayoutHelper.php:76
9 Joomla\CMS\Layout\LayoutHelper::render() JROOT/administrator/components/com_content/tmpl/article/edit.php:112
10 include() JROOT/libraries/src/MVC/View/HtmlView.php:410
11 Joomla\CMS\MVC\View\HtmlView->loadTemplate() JROOT/libraries/src/MVC/View/HtmlView.php:203
12 Joomla\CMS\MVC\View\HtmlView->display() JROOT/administrator/components/com_content/src/View/Article/HtmlView.php:116
13 Joomla\Component\Content\Administrator\View\Article\HtmlView->display() JROOT/libraries/src/MVC/Controller/BaseController.php:645
14 Joomla\CMS\MVC\Controller\BaseController->display() JROOT/administrator/components/com_content/src/Controller/DisplayController.php:64
15 Joomla\Component\Content\Administrator\Controller\DisplayController->display() JROOT/libraries/src/MVC/Controller/BaseController.php:678
16 Joomla\CMS\MVC\Controller\BaseController->execute() JROOT/libraries/src/Dispatcher/ComponentDispatcher.php:143
17 Joomla\CMS\Dispatcher\ComponentDispatcher->dispatch() JROOT/libraries/src/Component/ComponentHelper.php:361
18 Joomla\CMS\Component\ComponentHelper::renderComponent() JROOT/libraries/src/Application/AdministratorApplication.php:143
19 Joomla\CMS\Application\AdministratorApplication->dispatch() JROOT/libraries/src/Application/AdministratorApplication.php:186
20 Joomla\CMS\Application\AdministratorApplication->doExecute() JROOT/libraries/src/Application/CMSApplication.php:293
21 Joomla\CMS\Application\CMSApplication->execute() JROOT/administrator/includes/app.php:61
22 require_once() JROOT/administrator/index.php:32

By the way - I am running php 8, as I expect the extension to be compatible ?

So with that fix he won't loose the images of a custom field that is attached to a parrent category, if he changes the article category between two sub-categories of that parrent category ?

And you have tried this setup

- Parrent Cat 1 - Custom field attached to this
--- Sub Cat 1
--- Sub Cat 2

Create article in Sub Cat 1, attach images. Then moved the article to Sub Cat 2 - that works for you and the images are still in attached to the article ??

So now my customer lost all his work again upon saving an article with images in a custom field with Showtime Image gallery. Both fields went empty upon saving the article !!??? What is going on here. I can see that the galleries are still there, BUT! The relation from the article to the gallery is gone in the fields_values table - how can this happen ??? How to recreate theese relations again ? Is it just adding new rows to the fields_values table or will this break something elsewhere ? Can you please fix this issue asap !!!