LO hangs with 3D chart graphic change

Version: 25.8.4.2 (X86_64)
Build ID: 290daaa01b999472f0c7a3890eb6a550fd74c6df
CPU threads: 4; OS: Windows 10 X86_64 (build 19044); UI render: Skia/Raster; VCL: win
Locale: en-NZ (en_NZ); UI: en-GB
Calc: CL threaded

I have a 3D pie chart that I am trying to change the image for the data series. I have changed 3 of the 4 series no problem at all. The data series for Korea, China and Taiwan all now show the relevant flag image, but every time I try to change the 4th, for Japan, LO hangs until I get the “Libre Office has stopped working” message. The screenshots show what it currently looks like and the edit that is consistently causing the crash. Is there any way to make this work?