'How can I debug with xdebug PHP SPL Properties?

My situation:

(php 7.4 and phpstorm 2021.3 on macosx m1)
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Xdebug v3.1.2, Copyright (c) 2002-2021, by Derick Rethans
    with Zend OPcache v7.4.27, Copyright (c), by Zend Technologies

My problem:

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