MrUks

ok, never mind then. I thought this was a new bug. Sorry about that 😉

Instructions:
1) create a new world in creative mode (I've used this seed: 1139890542)
2) build a portal and activate it
3) go to the nether and disable the portal (either by destroying a block or the hole portal
4) do /kill and go back through that portal
5) you should now be in the nether with the remains of the old portal

in the testworld, I've already done everything up to step 4 (didn't go back yet).
If you repeat the proces, somtimes you get a portal, sometimes you don't and rarely (until now it happend 1 time out of about 50 tries) you get stuck inside a wall and the portal won't be lit

logically you would think that it would be added, m=! means "gamemode not equal to"