Frogs aged up in the nether do not produce froglights

Using slimeballs to age up a tadpole in the nether causes froglights to not be produced apon the frog eating a magma cube

What I expected to happen was...:A froglight should be dropped after the frog ate the magma cube

What actually happened was...:a magma cream was dropped after the frog ate the magma cube

Steps to Reproduce:
1. Place a tadpole bucket in the nether
2. Use slimeballs to grow it into a frog
3. Bring a small magma cube to the frog