Broken/Ghost Pistons

My name is Sonic20Abby Ingame but Sonic 2.0 (Abby) in Discord. While my Friend Whitechicken001 was making a Grimoss Farm in my Realm, they Placed Pistons for it, but i was offline at the time when they made it so when i logged back on there was just no Pistons. We tried placing new ones but we could not place anything on the blocks, its like they are Barrier blocks but we can walk though them. it also does not work if we use a Sticky Piston to push something into the spot or to push it out. We also tried adding a Custom Block but that also did not work. Kiomi was Trying to help but wanting me to make this. Hopefully this helps!

(UPDATE 11/26/23 3:36pm PST)
I was able to find out what the Problem was! Turns out is when u place Grimoss infront of a Observer with a Design like The Picture, the Piston works for a sec then fully breaks, U cant Mine It, It Wont Work With Redstone, U Cant Push It With Another Piston, And once u leave the Realm and come back, it disappears like it was not even placed, but u also cant place blocks on the spot it was in. I did a couple of tests in my Realm so theres a couple of spots with this Problem. It Also seems the same with Sticky Pistons, once Grimoss is place Infront of the Observer, it goes then fully stops and u cant do anything. This maybe a huge Problem in the Future so im glad i was able to find this Bug in time before any Damage could be done.

Hopefully This Helps A lot This Time!