Do GameObjects sometimes fail to be rendered or transferred to video card?

Unity Engine
1

Is there a known Unity bug that sometimes causes GameObjects to randomly fail to render or transfer to the video card? For some reason, one of the objects (a mannequin and its base) in my current game was missing once during testing today, without explanation. It isn’t programmed to do that, and it’s just part of the scene rather than being loaded in separately; in fact there was no runtime loading since it was in a special test mode that doesn’t go through the normal process of asking the player to choose a “level” to play. I couldn’t reproduce the bug, since the object was always there in subsequent runs with identical conditions. The fact that the base was missing is especially strange, because that can’t move at all (the mannequins can tip over if the player is extremely close, but the base has no means of moving). I’m baffled, and it was frankly a little spooky since it’s a horror game. :hushed:

Here’s the culprit:

2

Did the logs say anything?

3

No. And nothing else was missing as far as I know, nor were there any malfunctions of other types. In previous days sometimes one of the doors would fail to automatically open during level setup (which is handled via a script that overrides the normal door settings for any door that needs to be open during the level) but I don’t see how the two bugs could be related since this mannequin is not altered by that script.