While using any emplacements shells "explode" after landing without making any sounds and explosion, only explosion mark and suprisingly shell stays.

Here what I see in console:

[Gredwitch's Base] lua/entities/base_bomb.lua:261: bad argument #1 to 'WriteAngle' (Angle expected, got no value)
1. WriteAngle - [C]:-1
2. Explode - lua/entities/base_bomb.lua:261
3. unknown - lua/entities/base_rocket.lua:389


[ERROR] Warning! A net message (gred_net_createparticle) is already started! Discarding in favor of the new message! (Undo_Undone)

1. unknown - lua/includes/modules/undo.lua:423
2. unknown - lua/includes/modules/concommand.lua:54