ID 469085 - Edge Chamfer causes broken polygon.

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Problem summary
Edge Chamfer causes broken polygon.

Customer reported version
modo.14.2v2

Customer reported platform
windows10

Steps to reproduce

1) Launch Modo and open the customer provided .lxo.
2) Select indented edges as shown in attached .mp4 and choose the Edge Chamfer tool.
3) Open Tool Properties, then select Edge End and set it to Triangle Fan.

4) Manipulate the edge with the Edge Chamfer tool.
5) Observe triangular polygons at the ends of the edges are missing.

Expected behaviour
Edge Chamfer tool should manipulate the edge with all polygons intact.

Actual behaviour
Tool causes broken polygons at ends of the selected edges.

Workaround
Unknown. 

Reproduced by support
14.2v2 - Windows 10
14.2v1 - Windows 10
14.1v1 - Windows 10 -regression

Unable to reproduce bug in: 
14.0v2 - Windows 10

Earliest version tested
14.0v2 - This issue does not appear in this version and has regressed.

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