RealismCraft textures are Bugged in Realms

 When i am using the RealismCraft Addon in a world uploaded to Realms or created in Realms with the addon active, many of the blocks of the addon appear as question marks. I have tried a lot of things and the Adoon's Team said its a problem with Realms and not the addon. So please investigate this bug.

How it is Happening:

The problem occurs when everyone leaves the world in the Realms for a few minutes, and when they come back to Reload the World, there are a lot of question mark blocks.