Using the Gutenberg editor will give you more functionality and fixes issues with page preview and html formatting issues.
To switch to Gutenberg block editor:
1) Settings –> Writing.
2) Activate Make G blocks from your Plugin menu
3) Get to editing your page and add blocks,
Gutenberg blocks adds a lot more functional panel options including a video and table panels.
The Maker Faire theme panels you used to can be found under ‘Make Panels’.