Is it possible you're putting on too much primer or too little? Do you put foundation or concealer on your lids? I'm assuming you haven't experienced this issue before so I'm wondering what's different that could be causing it. Did you switch cleansers, eye makeup removers, eye night cream?
I don't consider myself an expert by any means, most of my knowledge comes from youtube, but I tweak what I need to. My morning routine is I wash my face and eyelids and eye area with cetaphil. I apply a moisturizing sunscreen (not near eyes), apply a face primer and then eye primer (I use NYX HD). I apply foundation all over - both on my eyelids and under my eyes (I tend to wear light eyeshadow), then concealer and I use the concealer underneath my eyes only. I set everything with a loose powder and when I'm done I actually press my finger into the lid of my powder and use it around my eyes to set everything extra well. This probably isn't proper, but I have oily lids and this is what works for me. I then apply eyeshadow etc. My eyeshadow doesn't crease ever (and I use a variety of brands), but this is what works for me. Of course what works for one won't work at all for another, I only mention all of this to maybe give you some ideas.
Again I wonder if something in your routine changed, application methods or maybe the formula of one of your facial creams even?