Im trying to add fullscreen countdown popup to my project and getting unexpected screen borders.
You can see this borders by different color at right and bottom edges at the screenshot below.
My countdown works next way - fullscreen semi-transparent UI Panel with child UI Text inside. It creates from prefab, assign parent canvas and display/hide by changing its ‘active’ property.
So whats the reason of not transparent panel borders and how to remove them not changing Canvas ‘Render mode’ to ‘camera’(it breaks ui positions)?

