generating og:image not working

[berecont]

Contao 5.3.3
Social Images 4.1.2

usage in events on detail-event-site:
modified event_full.html5

        <div class="col-lg-8">
            <div class="entry-image mb-5">
                <?php if ($this->addImage): ?>
                <?php $this->insert('image', $this->arrData); ?>
              <?php endif; ?>
            </div>

            <?php if ($this->details): ?>
            <?= $this->details ?>
            <?php else: ?>
                <div class="ce_text block">
                    <?= $this->cspInlineStyles($this->teaser) ?>
                </div>
            <?php endif; ?>
        </div>

• activated in page layout » no og:image is generated
• set default image in site structure » og:image with default social image is generated

og-image for teaser-image at Events setting will be not generated.
og-image, set in 'Social Image' at Events setting will be not generated
If there are content elements set at event » those images will be generated as og:image