Saddles held in the offhand cannot be equipped onto horses by right-clicking them

The Bug:

Saddles held in the offhand cannot be equipped onto horses by right-clicking them.

This issue is not present with striders or pigs.

Steps to Reproduce:

• Obtain a saddle and summon a tamed horse.

• /summon minecraft:horse ~ ~ ~ {Tame:1b}

• Hold the saddle in your offhand and right-click the horse to attempt to equip it with the saddle.
• Take note as to whether or not saddles held in the offhand can be equipped onto horses by right-clicking them.

Observed Behavior:

Saddles held in the offhand cannot be equipped onto horses by right-clicking them. If you were to attempt to perform this action, you would just mount the horse instead of equipping it with the saddle.

Expected Behavior:

Saddles held in the offhand would be able to be equipped onto horses by right-clicking them.