chamfer calculation stuck

 From:  Mr. Yuri (MR_JURAJ)
9101.1 
Hi All,
I wonder if more people experience this or I'm doing something wrong.

I selected all upper faces of attached sign and hit chamfer.
Set size (no preview shown) and hit DONE my mouse just shows like PC is working but nothing happens.
No extra noticeable CPU usage and model can be moved while it still shows "calculating..."

This also happens when I select only one letter and 'use 2 distances' option.

Chamfer size is not ridiculously high.

Regards,
Juraj
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