I’ve been having a bit of a problem with my Cuboid lately that I never noticed before. When changing tanks, it won’t give me the “new coil” message. Even after taking the tank off, hitting the fire button and re-installing the tank. The vape is extremely weak. The only way to get it is to open the battery compartment for a couple of seconds, closing it and hitting fire. All is well with the world after that. I may try re-flashing the firmware and see if that helps.