Collapse doesn't work properly

[flymedllva]

There is no animation in Safari
In Firefox, the animation at the very end is subtractive, if you look closely
https://c0bra.github.io/svelma/components/collapse

[abbychau]

Svelma is just using svelte/transition as the only dependency.
the demo is no difference than the transition:slide|local attribute.

I suppose that is the problem from svelte/transition. Currently I can think of no fix, but I will take a look to see if there is any work around on that.

[flymedllva]

I assume that the work is going on here
sveltejs/svelte#4712