The bug
When trying to collect honey into an empty glass bottle while in Creative Mode, the glass bottle is replaced by a honey bottle, instead of a honey bottle simply being added to the inventory.
What I expected to happen was...:
The glass bottle would stay in addition to receiving a honey bottle.
What actually happened was...:
The glass bottle disappeared.
To reproduce
Assemble the set - collect a glass bottle and a filled bee nest.
When the bee nest is filled with honey, attempt to collect it. Make sure you're in Creative Mode.
Notice the disappearance of your empty glass bottle and the appearance of a honey bottle as if you were in Survival Mode.
Confirmed/Reproduced in 20w28a.