Default Sms issues. Need help!

My d2tmo is running the latest cm11 nightly and as of last week has been buggy with sms. When I receive long text messages I do not receive the last half if the message and the message ends with the word, null. It's very frustrating and I've searched everywhere and cannot find a fix. I've primarily used the stock app but I've used others and still the same result. Thanks for any help!

Sent from my SGH-T999 using XDA Premium 4 mobile app