Surface issues when printing PETG support interface on PLA

Hey all. Pretty new printer here. I’ve been messing about with printing PETG support layers for PLA models on my X2D, but whenever I do I get these really awful horizontal artifacts on layers where the supports print. I’m pretty positive this is just from the model cooling down while the filament changes/purges and the nozzles switch, but I’m not really sure what I can do about it. Is there a setting I can look at changing to try to even this out, or is this just the trade off when printing with this kind of supports?

Info:

Printer - Bambu XD

Right nozzle - Bambu PLA Tough+ coming from AMS (calibrated)

Left nozzle - Bambu PETG Basic (default settings)

Print profile - 0.12mm High Quality Preset and default PETG support interface settings

Build plate - Cool Plate Super Tack

Thanks so much for any help!