So, a few weeks ago, I was playing Minecraft on my computer, and my base was near a large village, and many of the villagers came to work in my home. However, as the day (in real life) went on, I noticed that the villagers were starting to disappear. After maybe 2 or 3 hours, my 20-30 strong village had been reduced to less than 10 villagers. Only 3 or 4 of the villagers were killed by zombies, all of which were quickly killed afterwards, and replaced by babies very quickly. There also weren't any illagers present. The area was well-lit as well.I believe this is a bug, and might also be present on other Bedrock platforms as well. Please check this problem out, thank you!

Note: I later deleted the world, after nearly all the villagers were gone, so no screenshots were taken. Also, because this was from a few weeks ago, so 1.16.21 didn't exist.

How to replicate: I don't really know, I guess just start a well-lit and safe village, and wait?