Odd behavior when using Actions with bind inputs

[kazzkiq]

I'm trying to use Actions (<element use:method>) for input formatting (mask), but for some reason it shows odd behavior on special circumstances.

I've tried two approaches. One using .addEventListener() to said input, and other using .set() to data from inside the Action. Both didn't work properly.

Here are two REPLs showing the odd behavior on both cases:

.addEventListener():
https://svelte.technology/repl?version=2.9.1&gist=a08e29c1548586929f4d78ad3d7fde02

.set():
https://svelte.technology/repl?version=2.9.1&gist=3469481210a03bf06a8fbef32c5f325f

[Conduitry]

Closing this in favor of #2446, which is more specific about what's going on here.