Glider on fade creates overlays

Loving everything you do, man. Thanks so much.
Just a slight issue with the Glider: when the transition is set to ‘fade’ using just text columns over a static section background, the text of the next slide is simply placed on top of the previous one and so on. It looks like it has an entry fade, but no exit fade. The previous slide/column never disappears, creating what looks like an illegible word salad. It works ok with ‘slide’ animation. But for what we want to achieve, we need the ‘fade’ effect.
What’s the trick?