Similar to this post I'm getting incorrect file paths being displayed on the front end when using Assets from within Wygwam. Unlike that post I'm actually getting this rendered on the front end:
I've tried the fix referred to in the comments to no avail.
It doesn't matter how many times I save the entry, so I don't think it's the same issue described here
Another difference I believe is probably key here is that the Wygwam filed is a Low Variables field type.