I've run into this consistently on a Lenovo i7 with 16GB RAM. Libreoffice 5.2.2-0ubuntu1~xenial0 from the libreoffice/ppa. Attempts to adjust memory sizes and object counts don't fix it. Removing allt libreoffice-gtk* works to fix the issue. I tried libreoffice-gtk3 and libreoffice-gtk2 individually and they each have the problem.
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