I am using ArcMap 10.5. 

I'm just trying to add some text, and I have no idea why but for the last maybe 30min, after I create them, they just disappear. I have tried other draw features (lines, polygons), restarting my map, trying different mxd's, restarting ArcMap and even restarting my computer. 

I am using the 'Drawing' toolbar. 

I am in Data View.