When walking into a nether portal, normally works as supposed to, but when re-entering a second time, sometimes it causes me to fall into a "Portal Loop", as I call it. I believe it's due to the fact that you no-longer spawn outside of the portal, and btw, I'm in creative mode. Once in this portal loop, I cannot get out, and I'm forced to ask someone to come online the server and do /kill for me.
Thanks for reading this.
(BTW, I was not moving anything in the video)
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-90605. You can find or add further information on that report.
If you haven't, please search before reporting any bugs, as it's likely that one exists already.