When I upgraded my redstone game files to 1.13.I discovered that the most things can't work properly.Then I found that the redstone can effect a block under another two blocks.That made redstone much harder.And much larger.I'm not sure if it's a bug.If it is.Fix it PLZ.
P.S:It still a problem on the 1.16.1
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Duplicate of MC-108
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We're tracking this issue as MC-108, so this ticket is being resolved and linked as a duplicate.
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The screenshots you provided are an example of quasi connectivity (a feature), and redstone contraptions tend to break after new versions come out.