while in JEI for Create mixer recipes, the two fluids from Create Crafts & Additions (seed oil and bioethanol) will add the size measurement to the item description several times a second, stacking to ridiculous portions. this persists even if I relog, but it DOES reset if I close the game completely and relaunch (solo play, no server, just on my pc).
it hasn't caused any crashes for me, but I didn't let it build up that much either. that said just a bit of casual mixer use searching was enough to build up what's in the following screenshot.