I was experimenting with commands and I discovered a problem with the give command. The command cannot give you the following blocks:
Nether Reactor Core
Glowing Obsidian
Info Reserved 6
Game Update Block
Portal
Invisible Bedrock
Please fix this glitch because it limits creativity. For the Nether Reactor Core and Glowing Obsidian, you can go into survival and use a silk touch enchanted pickaxe (Diamond Pickaxe) to get the block, same goes for the other blocks except Portal and Invisible Bedrock.