Notifications and Apple messaging weirdness

I have a 5S paired with Apple device. The notifications seem to have a bug. I get all the notifications I expect - voicemail, apps, iMessage, SMS... but the iMessage notifications come up at the time but don’t then appear in the history and I can’t click a button to see the whole message rather than a summary. Anyone else had this? It is really irritating because I can scroll through apps telling me something or other is now available but can’t access my kids messaging me mid-run.