Who I have the same questioned this topic

The problem occurred yesterday and it had been over a month since it occurred. I also have the Verizon message plus app on my iPad and it did not ring too. Could this be causing the issue. Of course rebooting the phone fixes the problem every time. Also I have a galaxy S7 in addition to my s9 and it experiences this same issue  about as often as my S9 no more than once a month.