IPF8400 sheet/roll output mismatch!!

[Streetwise]

I've had this printer for 9 years and have never run into this issue before...

I can proof an image on 8x11, but then when I go to run it full size on the same roll material, the resulting image is blown out and nowhere near the same output of the 8x11 proof! All the profile settings are identical, only the paper size is different (roll vs sheet). Anyone else ever run into this?

Ventura 13.6.4
Photoshop 25.6.0
Plugin 6.03

[Streetwise]

Update: It doesn't seem to matter which version of Photoshop. 24.5.0 (ie. 2023) just gave me the same results with roll paper.