~ (tilde) broken in Roo scripts

In STS 2.9.1, create a Roo project and run the following roo script:

jpa setup --provider HIBERNATE --database HYPERSONIC_IN_MEMORY
web mvc setup
enum type --class ~.domain.enums.Roles
enum constant --name ROLE_ADMIN
entity jpa --class ~.domain.Person
field enum --fieldName roles --type ~.domain.enums.Roles --notNull
entity jpa --class ~.domain.Keptfile

NOTE top.level.domain.Person will be created correctly
BUT top.level.domain.domain.Keptfile will be created (which is incorrect)

Worse, this confusion continues AFTER a restart of STS!
Just try the line: "entity jpa --class ~.domain.Keptfile2".

If you remove the line "field enum --fieldName ..." and create a new project, the problem will not appear. However this always worked in STS 2.8.M2 and earlier.