Piston collision is incorrect
Investigating
The collision bounding box on the large and small piston is too large on the negative regions of the X- and Y-axis. Because of this offset it’s currently not possible to place full armor blocks around a piston which also is having an armor block on the top plate.
A temporary solution around this issue turns out to be two pistons on top of each other but in opposite direction, thus balancing out each others collision offset. It can be difficult to place armor blocks around the piston using this workaround, but if the build key is spammed enough times the blocks will eventually to be placed successful.
See the attached save game for examples.
Files:
Piston Collisio...
I have the same bug
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