Custom voice mail issues after update.
In custom voice mail, I could previously record a custom message and after saving it, I could play it over and over at any time by selecting it, however, somewhere along one of the IOS updates, I lost that feature and I can only play my custom message once, after that, the “play” letters are grayed out and I cannot replay my custom voice message. I know for a fact that it has not been a problem for the iPhone X, but it has affected my iPhone 6s + and other phones below the X model. This is not, therefore a hardware issue with my phone, nor is it a software issue per say, on my device, but an issue that perhaps Apple is yet not aware of, and it could be remedied with a software upgrade. Please advise.
iPhone 6s Plus, iOS 12.1