TYPO3 Core

I think problem is in typo3/sysext/backend/classes/PageLayoutView.php line 1239 and following:

if (!empty($elFromTable) && $this->isPageEditable()) {
            $pasteItem = substr(key($elFromTable), 11);
            $pasteRecord = BackendUtility::getRecord('tt_content', (int)$pasteItem);
            $pasteTitle = $pasteRecord['header'] ? $pasteRecord['header'] : $pasteItem;
            $copyMode = $this->clipboard->clipData['normal']['mode'] ? '-' . $this->clipboard->clipData['normal']['mode'] : '';
            $addExtOnReadyCode = '
                     top.pasteIntoLinkTemplate = '
                . $this->tt_content_drawPasteIcon($pasteItem, $pasteTitle, $copyMode, 't3js-paste-into', 'pasteIntoColumn')
                . ';
                    top.pasteAfterLinkTemplate = '
                . $this->tt_content_drawPasteIcon($pasteItem, $pasteTitle, $copyMode, 't3js-paste-after', 'pasteAfterRecord')
                . ';';
        } else {
            $addExtOnReadyCode = '
                top.pasteIntoLinkTemplate = \'\';
                top.pasteAfterLinkTemplate = \'\';';
        }

Rendering of the icon depends on $this->isPageEditable(), perhaps it should be:

if (!empty($elFromTable) && $this->getBackendUser()->doesUserHaveAccess($this->pageinfo, Permission::CONTENT_EDIT)) {

Patch set 2 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/64105

Patch set 3 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/64105

Patch set 2 for branch 9.5 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/64282

Patch set 3 for branch 9.5 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/64282