It was a joint venture of responsibility that has been corrected on the 3. Unboxed, went to settings and turned on wifi calling...has worked ever since.
Memory issues do abound as I normally run 4-6 apps at a time and memory manager is already showing 3.1 gb used. I often have apps refreshing and on my S9+ with 6gb I don't have this issue. Of course that galaxy is still running 8.1 so i'll wait on an update and go from there...but with that...