limpid trout
Omg - content was deleted because I was adding a video link to show the bug. You should really change that setting for the bug reports section.
So again: mortar seem to use the tank main gun shot smoke animation. It can be seen on a youtube video. Replace the space with a dot to view the link correctly:
youtu be/yjfmjFWojJE?si=oW6ESKFsGZDLBh0x&t=2377