The addBlacklistAddress function does not check whether the user has WHITELISTED_ROLE
The addWhitelistAddress function does not check whether the user has BLACKLISTED_ROLE
If WHITELIST_MANAGER_ROLE grants WHITELISTED_ROLE to blacklisted user and does not remove BLACKLISTEDROLE, the user cannot transfer UStb token in `WHITELISTENABLED` state from L205.
It is recommended to change the code as follows:
