Minimal example:
@startuml
skinparam RoundCorner 25
class Foo
class Foo2 #lightblue
@enduml
expected:
Both classes are rendered with 4 round corners
result for 1.2018.12:
- Foo is rendered correctly
- Foo2 is rendered with round bottom corners but with pointy top corners
result for current beta (1.2018.13beta4):
same as 1.2018.12
The same behavior occurs with other elements with stereotype letters in circles.