Who I have the same questioned this topic

I'm having similar issues.  When I send texts, my phone will say messenger app has stopped working and will kick me out of messenger.  When I go back into messenger my message will be showing as "sending" but I have confirmed the texts are being received by recipient.  Also I do not get all the replies during times when the phone is acting up.

Driod Mini using Adroid 4.4.4