Some modded blocks rendering invisible?

[Looke81]

I created a custom modpack using for and I cant figure out why on some clients blocks are rendering invisible but on others they aren't.

 

Example of see able blocks:

 

Example of invisiball blocks:

 

Link to a dropbox to the modpack in case people want to download it:

https://www.dropbox.com/sh/fj0eo8h6qyhl8us/AAAZaN6phaDaF0G3NVbJDVBCa?dl=0

[LexManos]

Logs files, and if you have optfine installed remove it.

Also make sure you downloaded all the mods from the original sources.