If it's a modded event it may be an issue in the mod coding, if it was a vanilla event a mod file may have conflicts with the vanilla coding. I'm not really sure how else to help because I have never experienced anything like this before.
If it's a modded event it may be an issue in the mod coding, if it was a vanilla event a mod file may have conflicts with the vanilla coding. I'm not really sure how else to help because I have never experienced anything like this before.