I've been noticing that when the Psychic Potential hotlink thingy inside the bubble that pops up in the chat (I'm so technical look at me!), it appears to register anything that isn't an open roll as a fumble - or at least it colors it that way. I think it may have something to do with the crazy formula that pops up in the dialogue box on screen where it asks for Potential, but I'm not super verse on the finer details of macroing to try and make it work myself. It's not exactly something that breaks the sheet, as the calculations still go in properly for the roll itself. I just figured I'd kinda gesture in its direction to let someone know.