Created attachment 158536 [details]
Four simple tests with different charts type.
Charts created wit Apache POI 4.1.1 are not displayed.
Charts are displayed correctly on Google Docs
Charts are displayed correctly on Microsoft Office 6.1 on Windows 10 Pro Version 1909
Four different tests charts are attached.
Bug confirmed also on Ubuntu 18.04.4 LTS
LibreOffice Version: 184.108.40.206
Build ID: 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1
I can confirm with Version 220.127.116.11.alpha0+ (Build ID: efca6f15609322f62a35619619a6d5fe5c9bd5a) and
Build ID: 95dbfd517240666e5b9a9fd7ac1d47d799235a62
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3;
Created attachment 159464 [details]
compare LO7 GDocs