TYPO3 8.7.24: graphical bug when using selectTree in tca

Question

When I'm using rendermode selectTree for my kategorie selection, then I've got an graphical bug. The bug independent from browser (tested in chrome and firefox). I found out, that it looks like the svg icon I'm using for this type.

My tca config for the field "eltern":

    'eltern' => [
        'exclude' => true,
        'label' => 'Eltern',
        'config' => [
            'type' => 'select',
            'renderType' => 'selectTree',
            'foreign_table' => 'tx_adressen_domain_model_adresskategorie',
            'foreign_table_where' => 'ORDER BY tx_adressen_domain_model_adresskategorie.kategoriename',
            'size' => 20,
            'treeConfig' => [
                'parentField' => 'eltern',
                'appearance' => [
                    'expandAll' => true,
                    'showHeader' => true,
                ],
            ],
            'maxitems' => 1,
            'minitems' => 0,
        ],
    ],

Answer 1

Resolved the problem with using a 16x16 Pixel PNG icon instead of a svg icon

TCA:

return [
...
  'iconfile' => 'EXT:adressen/Resources/Public/Icons/Adresskategorie.png',
...