Invisible block

That is likely Block 36. Right-click it, and if it disappears, then it’s Block 36 and not a bug.

it is if its where it looks like it is... This invisible block looks like its infront of the piston. no piston in the place of where the invisible block is so block 36 shouldn't exist there.

Block 36 is the place holder for a block being moved by a piston and if there is no piston facing in that direction then it is a bug. Not to mention it should immidiatley disappear after the piston and block have finished moving.

Is this still a concern in the latest Minecraft version 13w48b? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

This ticket is invalid without the requested information, no response has been received within a reasonable time and we are assuming the issue has been resolved. If you are still experiencing this issue, we can reopen it at your request.