I started as a count in Brittany, and eventually the Duke took Cornwall and created the Kingdom of Brittany. I fought him for his Duchy, then after winning that fought him for the Kingdom (all through plots). After I got the kingdom, I changed it to elective. Soon I used a weak claim to take a Welsh duchy, and then created the Kingdom of Wales. The Kingdom of Wales used the same laws as my Kingdom of Brittany. I've listed all the steps since it seems I've had a different experience to everybody regarding the mirroring of laws to newly created titles, and I didn't encounter this bug.
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