Wrong detection of overhang

[espr14]

v2.1.0 beta 2 win64

Object is symmetrical but detected overhang is not. This is not the only object with the same issue.

overhang.3mf.zip

[ManuelMcLure]

Is it possible that the object is not perfectly flat on the bed?

[Jebtrix]

That is caused by elephant foot compensation. It can end up decimating geometry. I do wonder how doing an X-Y scale on the first layer is causing this specific result. If you use an even rotation value ie 314 is does get a lot better but not perfect.
I also wonder if the elephant foot compensation is calculated after local rotation is applied or before. Doing a X-Y scale before or after can have very different results.

[haarp]

Can confirm, I've seen this too. Elephant foot compensation does some really weird things to geometry. See #2502 for another example.

[bubnikv]

The elephant foot compensation improvements are part of PrusaSlicer 2.2.0-alpha2. Closing.