Weird ah glitch

So my friend and i were on a Bedrock World doing Redstone, we were just working on a machine since the pistons weren't moving on the level and it appeared, it was like a Ghost block but we couldn't figure out how we did it

https://preview.redd.it/4og1yz23cvte1.jpg?width=301&format=pjpg&auto=webp&s=f05ae40317fbe1a53a4344cfdf9fba318f1b65ed

https://preview.redd.it/pnc5yst3cvte1.jpg?width=301&format=pjpg&auto=webp&s=103540d65071b2289ebd659ad2b64899a16fd143