So I was testing this out, and once I removed the polling node that was coming up after my input and message node, the preview worked fine to Facebook.
It broke between the input and message nodes, but once I removed the polling node, it worked fine.
I am unsure if it is an issue with displaying the images to Facebook messenger or something else (I didn't try it with another service).
So it looks like I fixed my issue - or at least have a work-around - now it looks like a particular node type (polling) that isn't working for me - I'll continue to play with my simulation to see if I can narrow it down.
So I was testing this out, and once I removed the polling node that was coming up after my input and message node, the preview worked fine to Facebook.
Input Node 'asking color' > Message Node 'acknowledging color' > Polling node
It broke between the input and message nodes, but once I removed the polling node, it worked fine.
I am unsure if it is an issue with displaying the images to Facebook messenger or something else (I didn't try it with another service).
So it looks like I fixed my issue - or at least have a work-around - now it looks like a particular node type (polling) that isn't working for me - I'll continue to play with my simulation to see if I can narrow it down.