I can confirm this, and add that it's pretty critical as it breaks most of the formatting toolbar.
As a workaround, LibreOffice can be started with another VCL backend with:
SAL_USE_VCLPLUGIN=gtk3 lowriter
(or SAL_USE_VCLPLUGIN=gen, if you don't have the libreoffice-gtk3 package and/or prefer the old-school style)
I can confirm this, and add that it's pretty critical as it breaks most of the formatting toolbar.
As a workaround, LibreOffice can be started with another VCL backend with:
SAL_USE_ VCLPLUGIN= gtk3 lowriter
(or SAL_USE_ VCLPLUGIN= gen, if you don't have the libreoffice-gtk3 package and/or prefer the old-school style)