I have a Motorola Droid Turbo 2 and use the Message+ app for my texting (version 6.7.7).

Over the last several months I have noticed that I am not receiving text messages from some contacts. There will be a group text sent out by a particular individual and I won't see it nor know they sent it, until another person in the group response to the original  text message. This seems to be happening with one particular contact. Now I am wondering if there are other texts that I am not receiving.