Xen two bugs: tentacle nocliping and alien limb floating

Two bugs i encountered.

Tentacle bug:

Before the tentacle got stuck in the wall, it flew away toward the skymap.
Then returned inside the rock like in the video at start

Limb bug:

First big alien fight against the Alien Controllers. After the fight, there was a Vortigaunt arm bouncing on water.

My PC Specs:

  • CPU : Intel Core i7-3770 3.4GHz
  • Motherboard : Asus P8Z77-V PRO ATX LGA1155
  • Memory : Corsair Vengeance 16GB 4X4GB DDR3 1600
  • Storage:-HDD: WD Caviar Black 2TB
    -SSD: Samsung 840 Pro Series
  • GPU : Nvidia GeForce GTX 1070 8GB
  • PSU : be quiet! 580W 80+ Gold
  • OS : Windows 10 64-bit