Unfortunately I have discovered another issue. Setting clipping type to SCISSOR solves "green" issue, but it causes another one It looks like the visible part of the scroll view is "moved" by some offset.
Here are all the cases (checked on Android and Windows):
1) Without RenderTexture (proper behaviour)
2) With RenderTexture and clipping type set to STENCIL
The visible region of the ScrollView is not moved.
3) With RenderTexture and clipping type set to SCISSOR
The visible region of the ScrollView is moved by some offset.
When I scale the window on Windows this region is changing. It doesn't happen when STENCIL clipping is set.
Could anyone help?