등록 버튼을 누르면 html code 내용이 바뀌어요! "src=..." 항목이 사라지네요. 어디가 잘 못 되었는지를 모르겠어요.

[Before 등록]

<p><iframe class="alltrails" frameborder="0" height="400" marginheight="0" marginwidth="0" scrolling="no" src="https://www.alltrails.com/widget/map/saratoga-gap-24mi-db07908?u=i" title="AllTrails: Trail Guides and Maps for Hiking, Camping, and Running" width="100%"></iframe></p>

[After 등록]

<p><iframe class="alltrails" frameborder="0" height="400" marginheight="0" marginwidth="0" scrolling="no" title="AllTrails: Trail Guides and Maps for Hiking, Camping, and Running" width="100%"></iframe></p>