No problem
I've used the bubbles for decades. My '08 GT has Blind Spot Monitoring, so I mounted them on the lower outside corners of both mirrors. Yes, both mirrors. Then, I set the mirrors down and inward to where they are the most useful when backing into a parking space or garage, and use the BSM and bubbles to monitor nearby vehicles. Yes, my NAV came with a backup camera - the absolute worst of any vehicle I've ever owned or driven. I've only had one bubble ever fall off, so heated mirrors don't seem to matter.