gui: addressbook editing error

[chlorocryptos]

when opening the 'Receive coin' tab, selecting an arbitrary address and trying to edit the label of the selected address an error is thrown in 'debug.log' and the edit action is not processed, i.e. the edited address label is kept unchanged.
error:
NotifyAddressBookChanged <address> <address label> isMine=1 status=1
Warning: AddressTablePriv::updateEntry: Got CT_UPDATED, but entry is not in model

curiously and quite erratically on the first edit action (of a newly opened wallet)
the edit is processed normally, i.e. the edited address label is changed accordingly and
the message in 'debug.log' reads only:
NotifyAddressBookChanged <address> <address label> isMine=1 status=1

cloakcoin qt wallet v. 2.2.2.2 on windows 7 64 bit