There is still yellowing inside the whites when I export, yes:
https://drive.google.com/open?id=1RXWN2wXB5iSpJk9eDby8vaHq20b9fmBE
However, the craziest thing was happening when setting the export settings... in the preview window in the export dialogue window the yellowing was there, but when I changed any setting (quality precent, image type, etc) the yellowing disappeared but then quickly came back. As though it was flickering on and off. I'm completely baffled.