Advanced Portals v0.0.30 (1.12 compatible)
UploadedJun 12, 2017
Supported Bukkit Versions
I would list that it has 1.12 compatability but bukkit seems to love to behind at adding versions to the list.
It was causing harmless crash stacks though it was filling the console
Also here is a video from the last update of the new portal block placing feature