Fix an allegedly unannounced spigot API behavior change that causes players to teleport inside a block (this fix may cause issues with older versions of spigot 1.15.2 or lower). This may or may not be due to spigot though, I'm not really sure. https://github.com/AcmeProject/WildernessTp/issues/60#issuecomment-587072723
Fix bug with signs (there's another bug as well but only happens when you use a new sign for a world you just created, and can be fixed with a reload or restart. I'll try to get a proper fix for it soon)
