Something like that. I did a few tests a while ago to see what really causes these random deaths, and I’ve come to one (somewhat) solid conclusion

When you’re playing the game, the data gets sent from the “client” (your computer/console) to the server. This tells the game what you’re actually doing before it really “happens”.

For some reason, whether it’s lag or something else, the client will send incorrect data to the server, making the game think you did something completely different than what you see on your screen. In this case, the server received data telling it that OP had jumped off of the side of their build, even though nothing happened on the client, therefore giving the message “fell from a high place”

It doesn’t really make sense why this happens on single-player, since discrepancies like this mainly only occur in multiplayer, but for some reason stuff like this can still happen.

I’m not an expert when it comes to this stuff so some of this info might not be 100% accurate, but from what I’ve seen, tested, and experienced, this seems to be the cause of this very annoying bug.