I was testing to see if a bug someone mentioned could be replicated (MC-182452). I sadly couldn't replicate their bug but whilst testing, I found another. The pistons on the bottom activate when they're not supposed to if placed in the way the second (now last) screenshot shows, but then work as intended with the first (now second til last) screenshot.
UPDATE: Added two screenshots. Seems to be random..? (or dependent on the coords of the block)
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It seems like there could be random probability involved
fullfungo
I was unable to replicate the described bug. You might want to include additional information such as operating system and circumstances, e.g. gamemode, single- or multiplayer.
ekul6547
I've investigated more into my report in MC-182452 and it turns out it depends on which side of 0,0 the pistons are on. I've made a little video showcasing this on the 4 different corners from 0,0: https://youtu.be/TE1hoDIewVo
Panda4994
Thank you for your report!
We have a couple of reports tracking the issues causing this. MC-11193 explains why it depends on the position how it behaves 🙂