Dispenser get stuck
For my design of chicken cooker, sometime random keeps lava blade out and don't restart itself. I manual restart its. See below images of front and back of its.

Texture Problems
When I used a texture pack doesn't render property but workaround is use F3+t to fix and same thing with items/blocks are 2D only 32x32 but like does 64x64 or high does work normal.

Piston Problems
At random times pistons do BUD in my fully automatic sugar canes farm.
At another times unpowered pistons stays out.