I'm currently developing a game in GameMaker Studio 2. I exported a simple skeleton with 2 animations, one which is a completely blank "idle" animation, and a sword swing animation called "attack".
When exported to GMS2, the "attack" animation works, but the "idle" animation doesn't. Both animations have the Export option checked.
Strangely enough, I also have an animation with the exact same skeleton and animations, but a different image, and it works fine.
Here's the JSON of the working animation: https://hastebin.com/xesisigeva.json
And the JSON of the animation where only "attack" works: https://hastebin.com/rovaluvose.json
I'm assuming I'm doing something wrong in Spine, which is why I'm asking here and not in GameMaker support. The GameMaker code used to switch animations is simply skeleton_animation_set. The first animation in the list is played by default.
Is there anything I could be missing?