The bug:
The fishing hook stays even though the player has changed dimension.

Steps to reproduce:
1. Build a nether portal at 0, 64, 0 in the overworld
2. Build a nether portal at 0, 64, 0 in the nether and link it up to the overworld portal from step 1.
3. Use a fishing rod in the overworld near the portal from step 1. Don't switch away from the fishing rod.
4. Go to the nether using the portal from step 1.
5. Stay near the portal in the nether and use the fishing rod and note what happens.

Observed behaviour:
Nothing happens the first time you use the fishing rod in the nether. 

Expected behaviour:
It should throw out a new fishing hook when you use the fishing rod in the nether.

Extra notes:

• If you don't do step 5 and instead go back to the overworld you will see the hook is still there if the chunk with the hook never unloaded.
• If the chunk with the hook unloaded then the hook no longer exists, but the player will still have a reference to the hook. This hook will not be ticked.
• If you go to the nether as you are catching a fish and the chunk with the hook unloads then you will still have a reference to the hook which is in the middle of catching a fish. The hook is no longer getting ticked so it will never stop being in the middle of catching a fish. So if you go back to the overworld and use a fishing rod then you will catch a fish.