Hi jes! Indeed another valid point :) We have identified this as an issue - it's not really understandable (or consistent) that the slider would disappear altogether when at the lowest brightness.

The plan is to leave a little bit of the slider on the left side, which will also serve as a reminder that the product can be brightened by using the slider. See the tentative design attached :)

I don't have yet a timeline on when we will deliver this specific point, but we're on it!