Created attachment 172735 [details]
Example file from PowerPoint
Attached example file was made in PP and the second slide contains a Contents placeholder with some table, chart, smartart, image, online image, video placeholders.
After saving the file and reopening it in Impress, the table etc placeholders seem to be preserved, but in PP they disappear.
Steps to reproduce:
1. Open attached file
2. Save as PPTX
3. Reopen it in PowerPoint
Placeholders have disappeared.
Placeholders are visible.
Version: 220.127.116.11.alpha1+ (x64) / LibreOffice Community
Build ID: 31ed81ea71a20ec119805f66a42f99b3f80d2dc5
CPU threads: 4; OS: Windows 10.0 Build 18363; UI render: default; VCL: win
Locale: en-US (hu_HU); UI: en-US
In 7.1 and older after saving not even Impress showed these placeholders, so there is improvement.
Created attachment 172736 [details]
The original file saved by Impress
Created attachment 172737 [details]
Screenshot of the original and exported document side by side in Impress
Created attachment 172738 [details]
Screenshot of the original and exported document side by side in PowerPoint
Fixed in https://gerrit.libreoffice.org/c/core/+/116828
Version: 18.104.22.168.alpha0+ (x64) / LibreOffice Community
Build ID: d1f1f546b212ecd651146addeb328806bb270d5f
CPU threads: 4; OS: Windows 10.0 Build 17134; UI render: Skia/Raster; VCL: win
Locale: hu-HU (hu_HU); UI: hu-HU