The top part of the stapel boom, seems to not have the same render distance as the rest of the boom, making it disappear once zoomed out(about 3/4 of the zoom out level)
i5 4690k - 3,5 Ghz, EVGA gtx 1070 ftw hybrid - 8 gb vram, 16 gb 1600 Mhz ddr3 ram