Interesting, glad you got to the likely root cause and thanks for sharing your findings back with us! I’d suggest reaching out to the dev at this point. Doesn’t seem like it’s anything core to the sim since you’re not seeing this issue with other airports. I don’t think this addon has been updated in a while, so perhaps some changes are needed for certain configurations??? GIven what I had to do to make this addon work for me, there’s definitely some improvements that can be made. And note for me I think I have every addon possible for Chicago, so I totally understand and expect conflicts to occur with my setup LOL.