Copy + Paste doesn't always work

So they way it should be, and always has been until recently, is when I copy text or images they stay copied no matter how many times I paste them. Now, at best I can only paste once, sometimes I have to go back and copy again before it will even paste that first and only time. This happens both in Indesign and Photoshop. Does this have something to do with a newer "feature" or is something wrong on my end? Does anyone else experience this? It is the simplest thing that should never stop working but is extremely frustrating.

I have a sick feeling this is similar to how Apple unloads apps as soon as you switch to another one, to save memory. If so I may give up on technology.