Slider auto-converting horizontal stacks to vertical

Hey Plasmic team! I noticed what appears to be a bug;
When adding a horizontal stack inside of the slider component, the stack automatically becomes a vertical stack…

https://www.loom.com/share/e5cd1db103c3410b914947670b45eced

I did also just now find a work aroudn,d which is to wrap the stack in another stack… so perhaps this is expected behavior?