The templates appear to be using a legacy editor style, which doesn't convert all elements when used to create an article in a knowledge base set to use the newer editor.
When creating a template, the user should have the option to choose which editor style to use. This way, users who prefer the legacy editor and use it don't have their template style removed, and users who prefer the newer editor don't have to create a template that doesn't reflect what elements will look like in the new editor.