TYPO3 Core

Confirmed the selectCheckBox case: this is ext:styleguide select_4 of tx_styleguide_required.

Could you add some demo TCA for the first case?

are these related?

https://forge.typo3.org/issues/58520
https://forge.typo3.org/issues/67913

Example TCA:

<?php
$GLOBALS['TCA']['tx_example_domain_model_news']['columns']['category'] = [
    'config' => [
        'type' => 'select',
        'autoSizeMax' => '30',
        'foreign_table' => 'tx_example_domain_model_category',
        'foreign_table_where' => 'AND tx_example_domain_model_category.sys_language_uid IN (0,-1)',
        'minitems' => '1',
        'maxitems' => '9999',
        'MM' => 'tx_example_news_category_mm',
        'multiple' => '0',
        'renderType' => 'selectTree',
        'size' => '10',
        'treeConfig' => [
            'parentField' => 'parent_category',
        ],
    ],
];

I can confirm that on 7.6.8, too.

In 7.6.10 this issue is fixed, maybe by the fix for #76388.

I also can confirm, that this is fixed in 7.6.10, so it's ok to close this issue.