Hi! I'm just start testing the new feature of <InnerBlocks /> and immidiately got a serious bug: the Inner Blocks doesn't work properly - it is synced with each other and not useable.
Can you please clarify the question? Do you mean the columns of the inner blocks and custom fields? To style them, please use some <div> tags and CSS code, like this example https://docs.metabox.io/extensions/mb-blocks/#example