Hi ​@Owenjuni,

I understand that you’re seeing an unexpected prototype result depending on the Canvas stacking order.

Let’s review how the prototype behaves based on your current Auto Layout settings.

From what I can see in the file you shared, there are two objects on the canvas, and it seems that the only difference between them is the Canvas stacking order setting in Auto Layout — is that correct?

Both objects include the “Fixed” frame and “Frame 3”, which are stacked together with no spacing between them.

• On the left side, the “Last on top” setting is applied, so the “Fixed” frame appears above “Frame 3.”

• On the right side, the “First on top” setting is applied, so “Frame 3” appears above the “Fixed” frame.

Up to this point, what we observe on the canvas is expected behavior. (Reference: Use the horizontal and vertical flows in auto layout)

Now, stepping into the Prototype behavior — currently, both prototypes look the same: the blue “Fixed” frame appears above “Frame 3” and remains there while scrolling.

Just to confirm, are you expecting the “First on top” version to display “Frame 3” over the “Fixed” frame when viewing the prototype?

If so, I’ll check if there are any related reports about this specific setting and will update you once I learn more.

In the meantime, while it might not be exactly what you’re looking for, I tested this on my end and found that using “Sticky (stop at the top edge)” instead of “Fixed (stay in place)” produces a result similar to what you’re seeing on the canvas. (Reference: Position elements in a webpage)

Thanks,

​@Junko3  Glad to get a reply

Here is the current situation of the Preview, which is correct. I expect the design draft to display correctly as well, but it is currently obscured below, just like the current First on top Design Draft.

In the user scenario, the Preview is also correct, but the design draft is incomprehensible. If Fixed (stay in place) is obscured below, it becomes meaningless. While it may be logically correct in the program, it feels unscientific in the user scenario.