Leashes remain attached to the player when removed from a fence while riding the attached mob

The Bug

When removing a mounted mob’s leash from a fence (e.g., pig, horse) while already riding that mob, the leash will be transferred to you while riding the mob. This causes you to hold the leash to the mounted mob while riding it. This is not usually possible.

Steps to Reproduce

1. Place a fence and summon a pig wearing a saddle.

2. Leash the pig to the fence.

3. Ride the pig, and then right-click on the fence.

Observed Results

The pig is leashed and ridden at the same time.

Expected Results

If the player is riding the mob it was attached to, the lead drops as an item instead of being leashed to them. If the player is not riding the mob, the leash should be transferred like normal.

Additional Notes

This does not seem to cause gameplay issues.