When ghost-placing most entities the player may place as far away from their character as they wish, but with Stone Brick tiles it is still limited to the character's reach.
I presume this may happen in concrete as well, but I haven't tested it.
[0.12.0] Ghost-placing brick tiles has distance restriction
Re: [0.12.0] Ghost-placing brick tiles has distance restriction
Thanks for the report. This has been fixed for 0.12.1.
If you want to get ahold of me I'm almost always on Discord.