I have a strange problem, occurred after I added a new number to my contacts (google). In the message lists I have a duplicated thread for this contact (only for this one)
As you can see below the contact Elisa is the same, same name, same number, only on gmail, I don't have phone/sim stored data, I do not sync facebook/whatsapps or other applications contacts...
I tried to do a factory reset and install a new rom.. I tried to delete the contact both from google and phone and re-adding it...
The weird thing is not only the duplicated thread but opening one or another I have the messages split