Reminder: this version requires Java 17, ensure you update Java as the latest works with old versions, even 1.8. If you want to get larger updates early consider becoming a supporter https://viaversion.com/donate.

Changelog:

• Fixed horse and llama inventory issues in 1.20.5->1.21 (by EnZaXD)
• Fixed issues with attributes in 1.20.5->1.21 (by kennytv and EnZaXD)
• Fixed shulker box tooltips in 1.20.3->1.20.5 (by EnZaXD)
• Fixed filtered book page handling in 1.20.2->1.20.3 (by EnZaXD)
• "Message not delivered" messages no longer appear in 1.20->1.20.2 (by Gegy)
• Improved the 1.20.3 crossbow max damage and 1.8 sword blocking fixes for 1.21+ clients (by RK_01)
• Tridents and banner pattern items show the correct 1.20 rarity in 1.20.5->1.21 (by EnZaXD)
• Fixed splash/lingering potions being invisible in 1.19 protocols (by EnZaXD)
• Fixed attribute keeping on respawn for <1.14 clients in 1.16->1.15 (by RK_01)
• Fixed show_item in translation components in 1.11->1.12 (by EnZaXD)
• Slightly improve on 1.10->1.11 fishing hook position desync (by kennytv)
• The 1.9 cooldown indicator is now completely hidden in 1.8->1.9 (by lowercasebtw)
  • The minimize-cooldown has been removed
• Fixed wither and ender dragon bossbars not working in 1.8->1.9 (by EnZaXD)
• Added cancel-block-sounds config option to toggle the 1.8 block placement sound fix (by EnZaXD)

Huge thanks to EnZaXD, KennyTV, RK_01, Gegy and lowercasebtw who all contributed to this load of bug fixes.