every damn 5-15 seconds the screen blinks black for 0.1-1 sec when i walk and rotate the camera angle, sometimes it's possible to notice the 'Loading..' text on it
issue is reproduced on both Java 7 and 8 versions, i have tried win7/win8/win10 and linux mint
not that my PC is that low specs, im running i7-2700k, 16gb, 680gtx and the only storage is OCZ SSD on PCI-E with up to 130000
any advice?

P.S ah it's all the same for original, latikai and ender clients.