Boot glitch

So i finally managed to install high sierra on my pc (see my post: https://www.reddit.com/r/hackintosh/comments/airqs7/success_with_high_sierra/) and it works perfectly

the only thing is that on every boot i get something similar to this: https://www.tonymacx86.com/attachments/screen-shot-1396-07-03-at-6-01-23-pm-png.280519/) but only for like half a second. After that it boots fine

Any idea how this could happen or how it could be fixed?

Thanks :)