It seems to mostly be while navigating through cities or walls. Sometimes half of my army will get stuck on the corner of a resource or building and twitch back and forth endlessly until I issue a new move command. Even with villagers and in groups as small as 3-4 villagers, if I command them to all repair a wall segment, often only 1-2 will actually start the action, the others just bob back and forth on the wall trying to get into position. Have to re-issue the command and then they seem to figure it out.
Thank you for the report @Heftydogg! We’re working on pathing improvements that will hopefully help.