without better evidences
everyone who looks like cheater

Do you need video proof? No, I didn't do video.
I gave you "Mission id" (2 events) and a nickname, by which you can check everything. If developers don't want to check the log files (or they don't exist), then I can't help anymore.

We understand to your complaints but we are not able to reproduce it and without additional information it will be not that easy to figured out.

For example, in the mode "Combat patrol" ammunition magazines are randomly added, after I'm taken grenades/ammunition from another corpse.
It only happens, if you have some bullets in your magazin and reload weapon.

Perhaps, you will be even more upset. This way you can go through any wall in the game. It all depends on the honesty of the players.
https://feedback.bistudio.com/T125705

by just going to the position

At any points of the ruins with any weapon. Do you need screenshots?

Should you encounter the issue again, please let us know.

In "Additional Information".

We were tried to reproduced it but without luck.

Similar case?
https://feedback.bistudio.com/T125587

What was the distance? 10-50m?
If the distance is 100-150m? Without optics? How to determine - the enemy or the friendly through the wall at this distance? If the friendly and the enemy are in the same building?
Better say, that shoot through the walls - a prerogative AI. And the question will be closed.

AI firing through a door in Combat Patrol. I killed him through that door.