Created attachment 139258 [details]
Happens also in 188.8.131.52
Open attached pptx test file: The chart image shows no colors where MS PowerPoint shows colors.
Confirmed. Thankfully, it has looked much worse in older versions.
You might also attach a PDF saved from PowerPoint so we see how exactly it should look like.
Arch Linux 64-bit
Build ID: c6a23023150c164a19236139fa413d43006ce21c
CPU threads: 8; OS: Linux 4.15; UI render: default; VCL: kde4;
Locale: fi-FI (fi_FI.UTF-8); Calc: group
Built on February 11th 2018
Created attachment 139845 [details]
EMF file extracted from PPTX file
Created attachment 139855 [details]
I've attached a screenshot as the 'save as pdf' in powerpoint is also broken.