Board Thread:Bug Reports/@comment-26347260-20170224192644/@comment-25101089-20170224193738

Thank you for the report. Was the area banner-protected? Invasions can't spawn mobs in areas protected by banners of enemy factions of the invasion, so that could explain it. (Having said that, invasions shouldn't actually spawn in such areas...) Also, for the sake of comparison, have you seen any invasions that do work in Beta 31.3?