The portal texture does not disappear from the screen even if you have already moved in mode spectator

Steps to reproduce:
1.Create a new world
2.Create a nether portal
3.Enter the portal and stay there
4.Put in spectator mode
5.Exit the portal in spectator mode

The expected results:
The texture of the portal disappears from the screen.

The observed results:
The portal texture does not disappear from the screen even if you have already moved.