With the Update Making Enlisted a Better Place №49 (Update about granades) I’ve encounter a problem with Granade launchers , They hit the target right in the chest but do nothing or just ‘‘hit’’ or kill a guy standing next to a guy that was hit directly . Another issue is that Granades from Launchers do not explode why hitting the groud . Did you guys encounter same problem ?
I didn’t, but please report this bug in bug reports.
I want to know what people like you know about that 
Sorry, I don’t quite understand what you want to know.
About the bug
Well, I think its a known issue, rifle grenades been having this tendency for ages now.
The most reliable way to make them work is shooting the ground.
There are many bugs in the game and some of them reappear after fixing it.
Flames going through walls were fixed at least 3 times.
Hi! Please make a report on the CBR with examples of grenade launchers not doing sufficient damage: Gaijin.net // Issues
I just scored multiple multi kills with grenade launchers, hitting the main target on the chest. I am yet to encounter this bug, maybe weapon / campaign specific if it is a real thing. Worked fine playing as Berlin Axis
yes i do have this problem 3 grenade shot and none of them kill the target it ridiculous