I am having this exact same issue in my survival world as well. No other entities have disappeared, only my villagers, and they do so in groups. My entire village's population disappeared without a trace for an unknown reason. While I understand that bugs (especially ones like these) can be difficult to trace and fix, it would be a massive help since these disappearances are detrimental to many players.
XRuneBlade
I am having this exact same issue in my survival world as well. No other entities have disappeared, only my villagers, and they do so in groups. My entire village's population disappeared without a trace for an unknown reason. While I understand that bugs (especially ones like these) can be difficult to trace and fix, it would be a massive help since these disappearances are detrimental to many players.