Talking too much.
I'm pretty sure this is being slowly worked out of me because I am more judicious about certain topics and no longer go with the phrase "I don't think I should talk about/tell you...but..." and then proceed to illuminate a potentially dangerous topic just because I have the information/insight. Fortunately I do FAR less of that and the opportunities rarely come up anymore
I've also felt a stout bit of condemnation/criticism from myself about it. There was a time I felt like even the Lord wanted me to "talk less" and it felt kind of harsh...but I get it. There is a time and a place for certain things. Sometimes not at all. If you talk people to death it turns them off.
I had a dose of it on the other side and I while I am also a pretty patient listener it can be exhausting if you are just listening to a massive string of someone's stream of consciousness.
So I'm on the fence on whether it's a flaw or not but definitely a learning process.
Sin appears to be a flaw however since this is BDF.
It's something that I am at a loss to explain. I understand the fall is what brought it in but even among righteous men (or those imputed righteousness) the flaw/anomaly still exists. Its power may be broken or defeated in the life of a believer but as a construct its effects are still felt. Kind of like spiritual grime (like being dirty and needing a bath)... Would be an interesting discussion...