While running a shader pack, the ghost blocks from the building guide almost disappear. For now shader needs to be disabled to see them.
1.12.2

You can try alternative method of drawing markers by setting useAdvancedRenderer to false in config.

Thank you for your suggestion, but I was unable to see a difference between the two options. You can see the ghost block if while looking through it there is a block somewhere behind it, but if while looking through it you are looking at sky or deep water the are nearly invisible. Im going to try some other shaders to see if it is a common problem but for now the following picture is what it looks like.

I have tried a few other packs and it works just fine in most of them but packs such as kuda(as shown above) and SEUS packs show some distortion in every version i tried though with SEUS you can see the blocks fine, they just look strange. tbh i think this is a problem on the shaders side not open blocks so im going to close this.