Some of the units shipped in the last production run were flashed with a firmware that can result in CC messages from Bank 1 to be present in other banks.
This can be easily fixed by reloading the Factory Firmware inside the Utility software. Ensure that you have version 2.85 of the Midi Fighter Utility (Windows/macOS) installed on your computer and then connect a single Twister to reload the firmware as the following image illustrates.
Midi Fighter Utility --> Tools --> Midifighter --> Load Factory Firmware --> Midi Fighter Twister (02 Oct 2019)
Important: If you have more than one Twister then select one of the other options on the secondary units to give them a unique ID.