Missles failed to guide during high velocity intercept

My 3km/s blaster launcher never succeed to hit enemy ships. After I did some test, I found after being fired all missles just turned 90 degrees and flew away, regardless of any given order.

I lowered the firing speed and the problem disappeared, but when I tested with another missle, launched with carrier module and intercept also at approximately 3km/s, they turned 90 degrees and greatly missed the target, so I assume the problem is related to intercept velocity.