The note block's name always appeared separated in the GUI: Note Block. But in the statistics, they appear as Noteblocks, when they actually should appear separated like in the item name (Note Block).

Note: There's another bug related to these strings, about the words played and tuned not being properly capitalized (see MC-58677). Since it's a single change in the default resource pack, they can be both fixed at the same time.

More info: https://bugs.mojang.com/browse/MC-76173?focusedCommentId=326163&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-326163