Created attachment 158338 [details] pptx file Create in PowerPoint two texts, grouped in one group. Apply the effect "Basic Zoom" (Zoom Básico in Spanish). Save document. Open document with LibreOffice 6.4.1, show presentation and the group not appears.
Thank you for reporting the bug. I can confirm the bug present in Version: 6.4.0.0.alpha1+ (x86) Build ID: ec7374ff84c71edfbb30d6e4dc5b486b6df7107f CPU threads: 2; OS: Windows 6.1 Service Pack 1 Build 7601; UI render: default; VCL: win; TinderBox: Win-x86@42, Branch:master, Time: 2019-11-10_21:37:30 Locale: en-US (en_US); UI-Language: en-US Calc: threaded and in LibreOffice 3.3.0 OOO330m19 (Build:6) tag libreoffice-3.3.0.4
Created attachment 169214 [details] How it looks in current 7.2 master in slide show view The Animation side bar displays the Zoom animation applied to the grouped object, but it is not visible at all (with or without animation) in slide show view in: Version: 7.2.0.0.alpha0+ (x64) / LibreOffice Community Build ID: 7eb289c49cc7245ef3001a39be0c15d06bbe875b CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: Skia/Raster; VCL: win Locale: en-US (hu_HU); UI: en-US Calc: CL
Verified in: Version: 7.4.0.0.alpha0+ (x64) / LibreOffice Community Build ID: 4ac9032163cf55c160145373e7c41741c9c339ca CPU threads: 8; OS: Windows 10.0 Build 18363; UI render: Skia/Raster; VCL: win Locale: hu-HU (hu_HU); UI: hu-HU Calc: CL