Maintainers for libqt53dquickrender5 are Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>.
You may want to refer to the following packages that are part of the same source: libqt53danimation5, libqt53dcore5, libqt53dextras5, libqt53dinput5, libqt53dlogic5, libqt53dquick5, libqt53dquickanimation5, libqt53dquickextras5, libqt53dquickinput5, libqt53dquickscene2d5, libqt53drender5, qml-module-qt3d, qml-module-qtquick-scene2d, qml-module-qtquick-scene3d, qt3d-assimpsceneimport-plugin, qt3d-defaultgeometryloader-plugin, qt3d-gltfsceneio-plugin, qt3d-scene2d-plugin, qt3d5-dev, qt3d5-dev-tools, qt3d5-doc, qt3d5-doc-html, qt3d5-examples.
You might like to refer to the libqt53dquickrender5 package page, to the Package Tracking System, or to the source package src:qt3d-opensource-src's bug page.
If you find a bug not listed here, please report it.