Recently I haven't been able to break any blocks or anything in survival, creative or servers. So whenever I accidently place something in any of my worlds or the servers I can't get rid of it. I am not going to attach a photo cause it wouldn't explain anything and it just looks like normal Minecraft. When I try to destroy something nothing happens: no cracks on the block it doesn't get destroyed, my charater is in operator and the player permission says I can break blocks, this is happening in all my worlds and Cubecraft Games I haven't been on the other servers for a while so I don't know about them. Is this just a problem with my computer or what's the reason this is happening?