I know this has probably been reported before, but I think lots of people (including me) thought that villagers would not randomly despawn when in minecarts or boats. They will now despawn at random times even if in a mine cart. I unfortunately do not have video showing them disappearing, partly because I think it happens when leaving the game or changing dimensions. It may have to do with crashes on startup and when changing dimensions, as I have been experiencing those. I have not yet tried using name tags but I will soon, if it still happens I will make another report. This is a huge issue as name tags are difficult to find and should not be the only way to prevent a supposedly non-despawning mob from disappearing. Thank you.