Due to a breaking change in Spigot 1.17, sending a title with an empty string no longer works, even if a non-empty subtitle is provided. The TitleAnnouncer and TitleHealthBar components only use the subtitle portion of the title API to avoid obtrusive behavior.
With this commit, the two components send a single space character as the title. Effectively, there is no difference between showing the empty string or a single space on the client-side. It's a dirty hack to fix something that should be fixed in Spigot instead, but odds are that it won't be.
Fixes#683
Nesseley
c9766dee97