Created attachment 165634 [details] Sample PPTX slide How to reproduce: Open the attached document in both LibreOffice and PowerPoint 365 and see how in the former the top lines (the "walls and roof of the house") are missing.
Created attachment 165635 [details] Visual comparison LibreOffice vs Office 365
Version: 7.0.1.2 Build ID: 00(Build:2) CPU threads: 8; OS: Linux 5.8; UI render: default; VCL: gtk3 Locale: en-US (en_US.UTF-8); UI: en-US Version: 7.1.0.0.alpha0+ Build ID: e6dfaf9f44f9939abc338c83b3024108431d0f69 CPU threads: 8; OS: Linux 5.8; UI render: default; VCL: gtk3 Locale: en-US (en_US.UTF-8); UI: en-US TinderBox: Linux-rpm_deb-x86_64@86-TDF, Branch:master, Time: 2020-09-16_21:55:32
Created attachment 165660 [details] The example file in Impress These shapes have a line with gradient color which does not seem to be a supported feature in Impress.
Lines are missing in 5.2, 4.0.0.3 and 3.3.0 as well.
Created attachment 166698 [details] Related(?) example This other slide and what is shows looks like it may be related, so adding it here: In Office 365 the lines have a gradient extending from the center to the two ends; in Impress the lines show solid. (Should I have been wrong, and this is different, please advise and I'll open a separate report.)
Found and older report with this same issue. *** This bug has been marked as a duplicate of bug 96533 ***