Great discovery, Lucie! And it does not seem like I have to do this save for every change, only the first time.
@dcarlsondesign, did this help you? I would be positively surprised, but you never know…
(I am experiencing the same problem, I think)
To be more precise. What I experience:
1. Create a simple one-slide slider with image and text.
2. Save and it works.
3. Reopen the slider, and the slide is “not good”: Image is not visible, several text style settings are gone (I lost font, size, color).
4. From now on, the slider is useless. The only way to get something to work, is to do it right the first time. I have not tried multi-slide sliders.