Studio One 6 - High Frequency Noise on Exported Stems

[Just Don't Quit]

In Studio One 6, I have a recording project and export stems into my mix/master project. On each of the tracks, there's high frequency noise that is not present on the tracks in the recording project. There are no effects on the master bus. Has anyone seen this before? Any ideas?

Here's an screenshot of Neutron 4's EQ on one of the tracks after export and import.