Steps to reproduce:
1. Insert a shape and select it.
2. Select Animation deck from sidebar, press + to insert an animation effect.
3. Category: Select entrance Effect: put on the brake.
4. Save it in pptx format.
5. Open the file in MS Office.
MS Office report the file has unrecognized content while opening.
And the animation effect doesn't play.
Created attachment 143556 [details]
Created attachment 143557 [details]
Saved as pptx by LibreOffice
Patch in gerrit: https://gerrit.libreoffice.org/#/c/57554/
Mark Hung committed a patch related to this issue.
It has been pushed to "master":
tdf#118768 fix pptx export of put on the brake animation.
It will be available in 6.2.0.
The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.