For some reason bevel is coming out lopsided despite the original geometry being perfectly symmetrical. enter image description here

I checked to make sure scale was applied and that there was no duplicate geometry or extra geometry attached causing the sides to not be identical.

One of the sides is directly on the x axis and the verticies on either side are offset by the same amount down to .00001 as shown below

enter image description here

enter image description here

Its like that all the way down each side. When I select more edges all the way around it bevels symmetrically as I would expect. enter image description here

What could be causing the original bevel to be so lopsided given that the selection is symmetrical, without duplicates and with scale applied?

I found that this issue can be recreated from the default cube with 4 loop cuts and 2 extrudes. Its more pronounced when the middle loop cut is removed, but present in both cases. enter image description here

Blend file with the default cube version here

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    $\begingroup$ Hello. Please consider uploading your .blend file here blend-exchange.giantcowfilms.com so others can take a look. Without that it's just guessing :). $\endgroup$ – Jachym Michal Nov 3 '19 at 20:26
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    $\begingroup$ <img src="https://blend-exchange.giantcowfilms.com/embedImage.png?bid=6763" /> I hope I added this correctly. $\endgroup$ – BlendNoob Nov 3 '19 at 20:31
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    $\begingroup$ Hey there. Source file works, and I was able to replicate your issue. Lets go investigate :). Btw. Thanks for preparing the blendfile so nicely. $\endgroup$ – Jachym Michal Nov 3 '19 at 20:42
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    $\begingroup$ Blender 2.8 here. And the behavior gets way crazier once I start to experiment with different bevel options - vertices are jumping all over the place with no apparent reason. It seems you really found a bug - and a rather nice one at that. Congrats :). $\endgroup$ – Jachym Michal Nov 3 '19 at 21:12
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    $\begingroup$ I should probably report it to the developers. Not quite sure how to go about doing that, guess I will have to look into that. Thanks so much for checking it out and letting me know its still present in 2.8 as well. $\endgroup$ – BlendNoob Nov 3 '19 at 22:29

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