Redstone blocks that have been moved by a piston rarely glitch out and create invisible blocks that have no hit box and cannot be broken in creative. The only way I've found of removing them is using a /fill command ext, or blowing up the invisible block. This bug was found on a server and has not been tested in SSP.
MC-64650
Redstone blocks moved by pistons glitch out.
Resolved
Incomplete
0
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.