During the start of Siege encounter yesterday enemies started to spawn in but vanished along with a Skiff for about 10 seconds. They came back but in more advanced positions and they were not taking damage. Today whilst carrying engine parts the spider walker became totally immune without being stunned and we just took a chance and walked past it, put the parts where they had to go and continued. Today Aksis phase two glitched and did not show being stunned and showed no sign if taking hits. Shanks at Aksis have also been teleporting. Today during Vosik phase two a team member wiped despite being in the centre of an activated clean room with plenty time to spare. I had an issue the other night where my dark drinker would not heavy attack even though I pressed the button hard enough repeatedly, controller is sound.