Twitch - Toggle Slow-Mode does nothing

[ArcAIN6]

As the title says, setting up the "toggle slow mode" feature,
Using 2.0.0-Snapshot

Steps to reproduce:

Drag toggle onto deck
Set Toggle Name to "hide"
Select Icon for button off state
Select Icon for button on state
Set Twitch Channel name
Set Duration to 15
Click the "save" button

Test button,
reload twitch page
check for slow-mode
slow-mode doesn't get enabled

(Yes, twitch API is logged in, and i'm able to send text to the chat using the "Send Channel Message" button