Glitchy state by entering the Nether from the End

The bug

Arriving to the Nether through a Nether portal in the End creates a glitchy state where mobs don't move and you can't visually drop items, place entities or shoot arrows. Via the /testfor command you can see that the dropped items are actually invisibly present.

To reproduce

1. Go to the End

   /setblock ~ ~ ~ end_portal

2. Go to the Nether from there

   /setblock ~ ~ ~ portal

3. See the problem. Find a Zombie Pigman and see that it doesn't do anything.