Hey there!
This update comes with a couple of "quality of life" fixes.

• Players will no longer fall while flying when (or after) right clicking an anvil
• Players will naturally fall when right clicking the anvil instead of "forcing" them to the ground (just like vanilla)
  
• Players can now place blocks around the anvil instead of accidentally opening it (not sure how I didn't check for this before)

Shout-out to @geekmakes for reporting these issues.