I got invited to a party once. Well, a search party. But then they cancelled it when they found out it was for my dog. They figured it was in a better place wherever it ran off to.

Agreed, but you still need a confirmation on the quit button to ask if you are sure you want to quit without saving.

Often animations get stuck (until a timeout is hit after ~30 seconds).
Sometimes units can appear on a city that already has a unit and is blocked from moving away which prevents ending the turn.
Sometimes linked units don’t move together properly until the next turn.
Capturing a builder or settler with a linked unit just deletes it.
Currently if you buy Gathering Storm DLC you cannot play it with anyone who doesn’t also own Rise and Fall.

And those are just the issues I noticed personally this week.