LO 6.0.7.3 freezes when opening pdf

PDF files that open in other programs without issue cause LO to freeze and CPU usage goes to 100%.

I’ve seen other posts describing the same or similar problem but haven’t found a resolution.

Any guidance appreciated.

Problem replicated on two computers / systems
Kubuntu 18.04
KDE Plasma Version 5.12.9
KDE Frameworks Version 5.44.0
QT Version 5.9.5
Kernel Version 5.3.0-45-generic
OS 64-bit
Intel Quad Core i5
8 GB RAM

LO Version: 6.0.7.3
Build ID: 1:6.0.7-0ubuntu0.18.04.10
CPU threads: 4; OS: Linux 5.3; UI render: default; VCL: kde4;
Locale: en-US (en_US.UTF-8); Calc: group

Identical problem on another machine with similar specs running Kubuntu 19.10

What the size of your PDFs causing this (LibreOffice isn’t a PDF editor and no PDF viewer at all)? Does this happen with any PDF document’s size?