Blobshadow projector flickering at runtime

Hi all,

My Blobshadowprojector for my mobile race game keeps flickering at runtime. After trying all the settings of the blobprojector, I tried to check for z-fighting, and ended up with just the road mesh and a shader with a -1, -1 offset, but that didn't matter. Then I thought might be due to the road mesh itself. When testing with a bunch of planes, it appeared that the flickering only happens on the plane that has a steep decline. This only happens at runtime on my test Android (Samsung Galaxy S 2), and not in the editor..

What is causing this, and how do I fix it?

Many thanks in advance!