I found a bug when using the crossbow’s zoom, after you zoom out the normal aiming reticule disappears from the screen for all weapons. It also causes the save notification when quick-saving to disappear as well. To fix it I just tapped ‘esc’ to the menu screen and back, everything returns to normal.
In Residue Processing a rather hilarious glitch occurred between loading points. After sliding midway down the chute from the trash compactor it stopped to load the next map, when it loaded, I proceeded to fall expecting to land into the water below, instead I was launched to the sky box, falling back down to a crushing death. Upon reloading, I landed normally.
Lastly, I noticed the tau cannon's animation when running dips down like every other weapon, except it does not rise back, It freezes and just pops back into it's normal position.