Explosive tick Stenhaga Farm

One of the ticks spawning in the barn at Stenhaga Farm is of the explosive kind (the one fnix harvester deploy). Is this a feature or a bug?

As far as I know, all Tick types can spawn out in the world.

Maybe my game is bugged then. Only prototype or military randomly spawns for me. The only fnix ticks I have encountered so far are the one fnix harvesters drop.

I don’t think it is a bug. I have found multiple fnix ticks at farms.