When tagging notes, you need to type the tag name exactly as it is to see the autocomplete.
Would be great to be able to type a portion (I don't always remember exactly how I had it typed):
Make it the same way as Omnifocus or Totodist allow you to type a portion of a project / tag, and still show it in the suggested list.
Examples:
Food Recipes -> Just start type "Rec"
Business Cards -> Just type "card"