Caramel color is the trigger for me, you may want to isolate that as well to see...

itronitron on Nov 26, 2018 | parent | context | favorite | on: Swathing is going out of fashion, as most farmers ...

Caramel color is the trigger for me, you may want to isolate that as well to see if it affects you negatively. Apparently caramel color is made by burning sugar (the stuff at the bottom of the barrel) and yields various byproducts.