Can not copy from Photoshop and paste into Illustrator

This is something i do every single day many times a day and not it does not work. I have tried all kinds of file types, layer types, etc and NOTHING consistently works. 

Here and there I can use the lasso tool to select an area in photoshop, copy and paste that selection into illustrator. But if on the same image i use command + A and copy it will not paste. 

If i make a new file it will SOMETIMES let me copy paste if i draw something with a brush. This is absolustely maddeding and makes no sense. 

Both Photoshop and Illustrator are up to date. I have annoyingly reset preferences for both programs. 

I have tried turning modern user interface on and off in photoshop. Nothing has helped.