In versions 0.15.0 - 0.15.2 redstone acts normally. But in versions 0.15.3 - 0.15.9 redstone connects directly to pistons as shown in one of the screenshots. This doesn't happen in Minecraft PC because if it did it would make redstone less compact. If you wanted to run a wire alongside a piston it would need a one block gap or else it will disrupt the piston. You might think this is good but most of the time it causes many problems when building with redstone.
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The way how redstone dust connects to pistons has intentionally been changed by developers. If you don't like the new connectivity please submit a feature request to the forum or reddit.
The way how redstone dust connects to pistons has intentionally been changed by developers. If you don't like the new connectivity please submit a feature request to the forum or reddit.
It seems like this may be a good idea to make redstone easier but there is a reason that PC doesn't do it this way. It makes contraptions less compact. It makes redstone harder to use. Please fix this! I will be posting this to the forums.