Exactly what the title says.
To recreate:
make a 3 wide by 4 long leaving it hollow inside, i recommend glass so you can see it.
Throw an item in the middle and place two honey blocks in the middle, it should get stuck.
Environment
Linux (KDE neon 5.19.5)
Open JDK 8
Does MC-118411 describe your issue? Honey blocks are less than a full block tall.