I created a nether portal, then I destroyed one of the blocks of the frame. The portal broke like I expected it to. After that I lit a fire on the broken frame and then fixed the frame. The portal wasn't created like I expected it to, instead the fire sat in the full portal frame.
MC-175071
Nether portal doesn't light by existing fire when the frame is created
Resolved
Works As Intended
0
This may seem like a bug, but actually isn't. The game generates nether portals when fire is first placed and if there is proper obsidian around it. In this case, fire was placed before there was proper obsidian, so a nether portal wasn't created.