New terms created when a term with commas is added in post editor

[awesiome]

When a taxonomy term has commas e.g "Red, yellow & green" and you add the term to a post in the post editor, the term gets added but new terms get created for the words before and after each comma. E.g you add the term "Red, yellow & green" to your post. That term will get added. However, you will also notice that two new terms have been created called "Red" and "yellow & green". Not sure if this is the case with both Gutenberg enabled.

[SirLouen]

Duplicate of #14691.