Orthographic render issues

I have an orthographic camera that is overlayed on top of a perspective camera

in orthographic view, i have 3 renderers: 1 big black ground and 2 small back planes that in front of the background, whenever i tween or move the 2 planes across the background, it “eats” away. I don’t know how else to explain it, further more when i move into the next scene, any gui objects placed in the same position as the tweening path for the 2 small planes is also “eaten” away.

I have included an image, the two icons tween from the left and right respectively

if i resize the window by dragging it around, in the debugger it fixes the issue, however when i publish i don’t have that option so the problem persist, please help

fixed: changed the property “Clear Flags” to “Depth Only”