Another Duplication bug

https://reddit.com/link/1oi9o7g/video/i36ppjmqsuxf1/player

(I am using the mod which gives Tarius passive to everyone, but I was able to replicate it without the mod to other races as well as shown in the picture below)

https://preview.redd.it/dkttnue6wuxf1.png?width=1920&format=png&auto=webp&s=73eb0fa27f06989624020ae59e3a8923e9787f46

This can be done on turn 1 as shown in the video. Don't know what triggers this bug to happen, but these are the steps I took to trigger it.