Created attachment 152278 [details]
A minimal example
The gif images are imported properly, they are shown in an animated way as well. However, the changes made in the Libreoffice itself do not take into effect during the presentation, but rather the original form of the image is displayed.
I attached an example 1-slide presentation to show the problem. Basically, the images look fine on the slide, they appear animated. However, when I enter the presentation mode, the slide shown is different (i.e. not WYSIWYG)
a) I drew borders around two of them, and they do not appear at all.
b) The applied 90 degrees rotation is not observed on the right most image.
Ordinary images I deal with such as .png and .jpg behave just fine in this regard.
Thank you for reporting the bug. I can confirm the bug present in
Build ID: b6b28931435e44aca92b8c0e1659f701e3ed1a87
CPU threads: 2; OS: Windows 6.1; UI render: default; VCL: win;
TinderBox: Win-x86@42, Branch:master, Time: 2019-01-30_06:57:04
Locale: en-US (en_US); UI-Language: en-US
Version changed to inherited from OOo due to comment 1.