September 2019
Not sure if this is considered a "bug" or not...
When I'm in the magic realm and I pick a spellcaster to "Duel at Dueling Field", My sim immediately goes to the dueling field, but the target sim does not. They go somewhere nearby where I initiated it. My sim always ends up going to the dueling field, waiting for a while, then flying back to wherever the other sim chose to duel and they duel there.
If I choose to "Duel at Dueling field", shouldn't they... you know... duel at the dueling field?
September 2019
@Psychotps, I tested this and was able to get the other Sim to the Dueling Area . However, in another save I had a problem with getting both my Sims to and back from Caster's Alley. One Sim would go through the magical portal just fine, but the other would get hung up and then wander off and do something else if I didn't keep an eye on him or her. This could be similar to what your are experiencing with duels. (I noticed when my Sims did this, it was mostly because they queued up and interaction to talk to another Sim they had spotted. Either that , or they decided to talk to another Sim after the portal interaction was dropped from their queue. It could be either.
September 2019