So over the last few days i've noticed several conversations under my messages are completely gone. I'm not talking about certain text messages within a conversation but the entire thread itself. I noticed it the other day and when i would scroll through i noticed that several people that i had a conversation with are completely gone. The only way to delete a convo is to slide left and hit delete or hit edit and click that thread and hit delete. I admit my phone has been acting up for several months ie acting slow or just not responding at times but never like this. I have convos that go back years that are just gone for no reason at all. Has anyone ever had this happened or have any clue why it's doing this? It's very frustrating.