Who I have the same questioned this topic

My Samsung Galaxy S7 did the Oreo update on Friday. It worked fine Friday and Saturday morning. Then randomly Saturday afternoon my Message+ app stopped showing notifications or making any sounds when texts are received. The only way I can tell when I'm getting a text is by turning on the selection to have the notification appear in the status bar which I can't stand. Please advise how I can fix this, it appears I'm not the only one having this issue after the update.