This happens most often than not. Whenever I create a new folder or file in the File Manager, the whole file manager goes blank. I mean all the existing listing disappears including the one that I just created. Right clicking again brings back everything along with the untitled folder I had just created. Is this a theme thing?
Edit: I use pop-lite theme and ePapirus icon theme.
As you can see here, I created a new file. But No file icon. Instead, an already existing folder by the name of reg changed to rename node
Elementary OS 5.1.4 Hera. Everything updated.