>If this happens, a new Zis gun entity will spawn in the same location to replace the loss caused by the bug.
From the patchnotes. Try sending the replay to the modders then if it didn't work.
the zis gun should reappear after self destruction. The replay below it doesn't at least in some cases.
Some remarks that might be of value:
1. One of the crewmen died during loading animation inside barrage.
2. The gun was reinforced when under fire.
3. The gun itself was 100% hp before self destructing.
4. The gun didn't accept any reposition orders after being placed in its final position.
The gun blows up on 32:30.