I always change the mobGiefing to false because I don't like the creepers blowing up things, lol. In the past snapshots I am sure I did too (it is the first thing I do when I start a new world) but the villagers were harvesting just fine. I will change the mobGriefing setting now & see if the villagers start harvesting.
I don't know anything about programing, just playing, but I would hope that it can be changed so the villagers will harvest with the "griefing" on false so the creepers don't blow up my builds. If it is a change & it can't be fixed then I will have to get used to the creepers & just be more careful.
IMO this should be a bug & I hope it can be fixed. When I changed to mobGriefing true they started harvesting in both villages & the one village had a baby villager within 2 minutes. I do hope though that we can have the griefing set to false but still be able to have the villagers harvest especially since it used to work fine. At least I know what the problem was so thank you for the help๐