Right-clicking a Respawn Anchor with an item in off-hand uses that item

When holding firework rockets in my off hand, and nothing in my main hand, when I right-click a charged Respawn Anchor to set it as my spawn point, a rocket is used in addition to my spawn point getting updated.

I know this was already corrected in a previous snapshot for when they're held in the main hand, but it seems the problem still exists with the off hand.