[1.11] Katyusha ignores butterfly bombs

^ What the title says, the mine explodes but does absolutely nothing to the kat. Haven't tested whether this occurs with other types of mine also.

I'm not 100% sure of this, but I think that the butterfly bombs are anti personal mines, which would indeed mean that they do hardly any damage to vehicles.
Cheers

They are primarily anti-inf but they do detonate and damage vehicles lightly as well, sometimes taking out the engine. Katyushas are entirely unaffected.