Last night I was playing on my island server rented from Nitrado, and whilst riding my trike I came across a dilo and two snakes, I thought hey no problem my trike can kill them. But, when I pressed right trigger to attack, my dino did nothing.. I thought DILO, ok glitch, so I dis mounted and ordered it to attack target, which instead of attack it just got super close and followed it around. Eventually I had to remount and run away to save my trikes life. Once safe, I re-logged and things were back to normal.
Later on... I was riding my trike to a supply drop, and encounter 3 pegostymax(the little thief bastards), and 4 dilos. I was like yeah! murder time! But once again, my trike was unable to attack anything, I dismounted again hoping it would defend itself. It did not. It was killed very quickly being defenseless and I was forced to retreat so I didn't die.
I've not a clue whats happening here. I have about 800 hours on the steam version and am a very recent transplant to the Xbox one. I don't know if its something I can fix, or if its something that has to be fixed by Nitrado, or by the devs. But it was quite frustrating, I've never seen this issue before. I did a bunch of googling and didn't come up with anything that seem related to this issue.
I will be keeping an eye out for conditions the next time it happens and try to narrow it down.