I've been having weird problem with conversations

Sometimes when i send a text msg to a number, the name turns blank like this :



And when i open it i got this



Usually i solve this by sending text to that number again..
But it's getting annoying if there's a new number and i haven't saved it, because i can't send a text to solve it

Any workaround for this issue?
EMMC reflash doesn't help, but it's probably because the backup is already corrupted?