Selecting all vertices on a face doesn't select the face and selects only some edges #89271

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14

Blender Version
Broken: version: 3.0.0 Alpha, branch: Unknown, commit date: Unknown Unknown, hash: ea4309925f
Worked: a9d5c8f97f
Caused by ea4309925f

Short description of error
Selecting a sequence of vertices that makes up a face don't select the face. The resulting selection also only contains some of the edges.

Exact steps for others to reproduce the error

Delete the default scene
Create a UV sphere
Select four vertices that make up one of the sphere's faces

Only three edges are selected, and no faces are selected.

Another example: after selecting these six vertices from the top left in a clockwise order, I wind up with these edges selected:

This can also happen when selecting edges. Four edges on a face are fine, but six edges around two faces wind up selecting neither face.

Added subscriber: @chemicalcrux

#96766 was marked as duplicate of this issue

#89293 was marked as duplicate of this issue

Added subscriber: @PratikPB2123

Changed status from 'Needs Triage' to: 'Confirmed'

Need to select verts individually or with circle select to reproduce the issue. Box select works fine so far.

Marking this as high priority because this is regression

@chemicalcrux , thanks for bisecting :)

Added subscribers: @pmakal, @Jeroen-Bakker, @mano-wii, @ideasman42

This issue was referenced by b2510b9e20

Changed status from 'Confirmed' to: 'Resolved'

Added subscriber: @AnityEx

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Selecting all vertices on a face doesn't select the face and selects only some edges #89271