So, im trying to add a secret message in a sequence of blinks but I’ve run into an issue with multiple things, animation and not in the animation view.
The frames will go off screen if there are too many.
As for not in the animation view, when placing the first block in the background view, it acts as a solid block when playing.

For the first issue: this is an issue I need to fix in the sprite editor. I need to calculate the sprite sheet size and limit the number of frames allowed. For now, just split the animation into two (or more) animations, and play them back-to-back if needed.

I don;t understand the second issue.

Whenever I go to create something in the background layer the first type created acts as a solid in the game world

oh i have that same issue. Reloading the page usually works.