Created attachment 159793 [details] Sample PPTX document Exporting this sample slide from Office 365 LibreOffice is able to open and view it just fine. Only the text in the four arrow elements is horizontally shifted too far to the left.
Created attachment 159794 [details] This is how it looks in Office 365
Created attachment 159795 [details] This is how it looks in LO - text elements partly invisible (and farther to the left)
Confirmed in LO 7.0.0.0.alpha0+ (f924658e45f256544e43c3fdb2af9b585d0f0933) & 3.5.0.3 / Ubuntu. In 3.3.0 none of the objects are shown.
I changed version to 4.2.x. Previously,text size was too small but later text position is not fully correct and in center of shape like in MSO. So it was never fine but bibisect in 4.2 can point to the change.
There were 2 changes in 4.3 repo per Linux bibisect: first, Miklos of Collabora made it look good with source-hash-798a563db133ebed3876c245459d90ef54ee7c9a (commit 07dbe52544f811e75d56a5ddcd59aecf1d8f0310). next, Muthu of Collabora made it bad with source-hash-c17eb67460293fbe72ffa8e80cd10743df493afa (commit 54adec3a9fc9f08a5f720ae227c9853b98ff5f53). n#862510: anchorCtr controls the anchoring as well. CC: Muthu Subramanian gmail address, I hope it's the right one Please see this regression.
The values from the <txXfrm> element of the diagram are not read for the shape type 'rightArrow'. I know where and how to fix it, but 'right Arrow' is not yet included in my work for bug 149551. But I put it on my ToDo-list.
That is fixed with commit https://git.libreoffice.org/core/commit/5df1bb4b1b222be00d25097660c4ee33542896ea tdf#135953 move txXfrm to compensate TextRotateAngle
This, too, is taken care of with Version: 7.5.0.0.alpha0+ / LibreOffice Community Build ID: 5df1bb4b1b222be00d25097660c4ee33542896ea CPU threads: 8; OS: Linux 5.18; UI render: default; VCL: gtk3 Locale: en-US (en_US.UTF-8); UI: en-US thanks to Regina's work. :-)