After a disagreement about 6 months ago someone blocked my messages on messenger and the “This person isn't available right now” message remained in the chat bar for months and I couldn't even try to type a message. Now, 6 months later the “This person isn't available right now” message has disappeared and typing a message is possible. However I don't want to try typing and sending a message incase it escalates what was a bad situation. Does the “This person isn't available right now” message usually disappear automatically like that after a few months?