1. is it windshield became partially visible? can't even recognize it, have no such problems. as all objects was replaced it shouldn't caused by some scenes or models conflict, but you can try to copy files from original mi-24v-pilots-cockpit and apply latest update one more time.

2. I'm strongly recommend you to move your scenes into some modern cockpit - Ka-52 for example. Mi-28 cockpit has very simple lighting because it's not really 3d, and making something there will cause huge problems. when your cockpit will be ready, all relative functions for Havoc will be updated anyway.