While loading into the nether, the player can be interacted with by other players or mobs, such as Ghasts or Skeletons. This can either cause the player to die without being able to have a chance at fighting back or be sent back through the portal and unable to go back to the nether. As well, it takes upwards of 15 seconds to load into the nether, and yet it takes less than a second for the Overworld to load in. This has been affecting my experience for years at this point, and it makes trying to progress through the game a chore because I can be killed at no fault of my own or trying to gather back the stuff that I lost in the nether because of a death, with no ability to gain it back.
I hope that it can be fixed as even though it's a general performance issue, it's extremely major for it to be known as an issue. Because yes I have been killed through this, and gone through a loop of trying to get my stuff back.