I think I just had my first experience with a hacker.

So recently I just had a game in my arty trying to grind for missions. We started out and there were 2 arties on each team. So me and the other arty decided to go ahead and get into position (not in a common spot) but on our way there, one of the enemy arties started to shoot at us and it was getting pretty close. We decided to move positions just in case. I finally set up when I got 1-shot by the enemy M44. Now, I was 100% not spotted (especially since I haven’t even fired a shot yet) and I was very far from the action with my entire team in front of me so there was no way an enemy was able to spot me. After that, I went to spectate my fellow arty which set up a bit away from where I was and he started to take some fire as well. The first shot luckily missed but the second one ended up 1-shooting him too. After that, the M44 seemed to target our TDS near the back, dealing major damage to them.
We ended up losing due to cap but I find this ridiculous. Has anyone else had something like this happen to them?
Btw, I have entered a ticket about the M44, hopefully WG actually does something about it.