There has already been a question like this, however either it is outdated or I'm seeing a special case.
I have ignored someone on Messenger, and want to undo this without actually sending them a message. When I open their conversation from Filtered Messages in the browser version of Facebook, there is no Reply/Delete option. When opening the conversation in the Messenger App, it only gives me one option: "I don't want to hear from [name]"
If I encounter this scenario, how do I undo an ignore?