The Bug

In Minecraft 1.20.4, 1.20.2, and likely other versions, the Nether Portal is buggy while in creative mode. Observed behavior has been tested from /setblock, unsure whether the same happens with built nether portals

How to Reproduce

1. Enter creative mode
2. Do /setblock nether_portal
3. Enter the nether portal, exit it once in nether, and go back in
4. You may need to try more than once to see what happens

Likely Explanation

While in creative mode, the player is able to enter a nether portal instantly. It is possible that there is a restriction/cooldown that prevents the player from entering immediately after, and can be displayed with the previous steps.

Notes

• Unable to find similar bug report
• Did not test whether this is only for /setblock, however, it occurs with the spawned nether portal in the nether
• Possible occurrences (that I have found [so far]):
  • Works as normal, player enters portal with no trouble
  • Delayed entering, but otherwise normal
  • Displays full animation before entering
  • Displays full animation but does not enter
  • Portal doesn't work at all, neither animation nor teleporting
  • [Most shown in attached video]
• Tested in 1.20.4 and 1.20.2, likely happens in other versions
• Tested in both third-party Lunar Client and Vanilla Minecraft, so is likely a Minecraft issue

Video exceeds 10MB, Dropbox link: 

Dropbox Link (Click here)