Facebook share og:image not pulling variable

Hey everyone!

I am having a bit of a problem with my Facebook sharing, and I was hoping for some input.

I am generating og data for Facebook using variables in a custom template. I am using all the og data meta fields, and all of them are being recognized in my source code. I go to the Facebook debugger, and it is grabbing every single og meta field except for the og:image field. The og:image is being left blank (content=""), even though the image is in my source code.

I have no clue why this is happening. It if baffling that the image url shows in my source code, but Facebook isn't recognizing it right away.

Then, from the debugger, I "fetch new scrape information" and the image url shows up.

The issue is that I don't want to have to fetch new data for every single new post.

Any ideas?