Magento 2 with Page Builder: How to get correct HTML tags

I just recently upgraded from 2.2.5 to 2.3.4

As i can see CMS blocks now have page builder, my blocks data got migrated correctly:

My Custom Title

however if i press save, i notice some extra HTML being added:


            <h1>My Custom Title</h1>

As you can see, the open and close symbols are being encoded into < and >

I still call the blocks normally using

$this->getLayout()
->createBlock('MagentoCmsBlockBlock')
->setBlockId('your_block_identifier')
->toHtml();

But the tags are not converted back correctly. What can i do to make the HTML tags are called correctly?