Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: AMD Radeon HD 7600M Series ATI Technologies Inc. 4.5.13417 Core Profile Context 0
Broken: version: 2.81 (sub 3), branch: master, commit date: 2019-08-28 03:44, hash: rBf88022b96f3a
Short description of error
in a primitive plane, not subdivided, the outer sides are not influenced by the "edge crease" operator.
this happens even in other conditions with various subdivisions ...
look at the picture.
Exact steps for others to reproduce the error