Blacklisted players interfere with reply funtions

Time:When conditions are met
Frequency:Everytime
World name:Famfrit
Character name:Z'attano Dhen
NPC name:N/A
Monster name:N/A
Class/Level:N/A
Party or solo:N/A
In-game time:
Area and coordinates:Anywhere
Steps:
1.RMT whispers me, I add to blacklist
2.Friend whispers me
3.RMT whispers again(No message received though)
4.Use reply function to respond to friend. RMT shows up.

Connection Specs
Not a connection issue

Model Number of the PlayStation 3 You Are Using
Not a platform issue

Been reported a bunch of times. Considered to be working as intended.