Hello StuGiles,
Welcome to the
PhD forum
Right now, as you're probably aware, PhD doesn't even recognise .CR3 files (compressed RAW format), let alone display them correctly.
I'm sure the team at CyberLink is aware of this, but I'll forward your concern. Squeaky wheels get greased, right?
PIX
P.S. As a temporary fix, convert to .DNG using
Adobe DNG Converter
PIX YouTube channel