Strange block behavior due to bastion placement

[ttk2]

Okay so I've encountered this exactly once, by a bastion that matured within possibly the the last day or so.

Bastion is at bedrock surrounded with 1 layer dro, reinforced to a group.

What got deleted was somewhere between 3 and 15 sign blocks; part of a trap.

The trap was a pit, 4x12, 3.5 deep.

&############&
&$$$$$$$$$$$$&
@            @
@ *  *  *    @
&%%%%%%%%%%%%&

@= stone reinforced obby

&= stone reinforced stone

= gravel (not reinforced)

$= sign (not reinforced)

*= lava

%= stone reinforced half slab

The trap functions as such:

All the signs are connected to a single sign which is connected to a single sign attached to a piston controlled piece of unreinforced stone.

When a button connected to the pistons is pressed, the pistons push the stone back and forth, causing the sign attached to it to fall off, causing all other signs to pop off, causing the gravel to fall. The gravel dissipates when it hits the stone slabs (the same way gravel does when it falls onto a torch), dropping the player in the lava.

Thus when I say between 3 and 15 signs were missing, I mean 15 signs were missing, though it could have only destroyed as few as 3 signs, causing the others to pop off

The bastion field envelopes (or should envelope if I measured it correctly) the entirety of the 4x12 pit, though NOT the piston or the stone the piston is pressing.

When I noticed the trap yesterday, a 3x5 chunk of it (all fully inside the bastion field, the opposite corner of the piston) of gravel had fallen. Oddly enough, the gravel did not dissipate upon contact with the half slabs, like it had always done, it was sitting on top of the slabs, and had overwritten the according lava blocks.

At the time, I did not associate this occurrence with a glitch in bastion, I believed it was one of my citizens who accidentally messed up part of it.

http://imgur.com/a/HQbri

In the fourth picture, you can see the 4 stone blocks connected to two pistons.

The 4 stone blocks get pushed one way by the left piston, causing the sign to pop off, followed by the rightmost piston pushing them back to the starting position. Note, the 3 smoothstone blocks themselves are NOT in the bastion field, but the leftmost piston itself IS.

http://i.imgur.com/YHfjJHI.png

Here's a map of exactly where the bastion field is located. The blue rectangle is the 3x5 blocks which were affected.

That's all the information I can think of to tell you, if you have any more questions, I'd be happy to answer them.

-Ogel