How to reproduce
1. Use a horse spawn egg to spawn a horse
2. Right-click on it with a normal item (horse rejects it)
3. Right-click on it with a creeper spawn egg (horse is mounted)
Applies to any spawn egg, except for the horse spawn egg itself (that will spawn a baby as expected).
Affects horses, donkeys, llamas, etc. Does not affect saddled pigs.
Linked issues
relates to 3
MC-127386
Right clicking on villager with its spawn egg opens trade menu
Resolved
MC-114112
Right click on boats, bamboo rafts or camel with 2 passengers plays hand animation and prevents the use of right-click items
Open
MC-124203
Right clicking adult skeleton horse or mule with spawn egg does not spawn baby
Resolved
Comments 4
My apologies for the resolve/reopen, after noticing MC-127386 was fixed I tested again and used the same spawn egg, which now does not cause the behavior. Any other spawn egg does.
tryashtar
Jens Bergensten
Affects 18w09a