I'm having the same problem with nursing moms. I used time warp for the build off and on one child. The nursing moms I'm having trouble with are the ones I used grant youth on, since they are maxed in devotion. I've only paused the game twice when I had to step away for a while. I've been able to start the clock my dropping a male villager on them. Since the nursing moms keep running away I keep dropping a male villager on them until they are waiting for someone. For some reason this starts the nursing clock up again.