Hi all so something I ran into my text messages were coming in days later at times. I had tried a new dialer and when I removed it that’s when my trouble started.
I realized by resetting all the permissions for everything (a minor pain) it solved the issue. If you go into settings search for settings for reset app preferences select it and the select it again. It will give u a warning.
Of your phone is acting up sometime an updated app you don’t know about could be the issue. Doing a reset like this is a good first instead of the nuclear option of a factor reset.
your tip 
. It will be my goto recommendation from here on before suggesting the nuclear option (aka reset).