I’ve tried to recreate the issue on my machine but no such luck. Naming and renaming events guns/launch/gp_25/ShotSupS, guns/launch/gp_25/shotSupS, and guns/launch/gp_25/shot_sup_s are all found by the system.
Can you confirm you are building the banks after the change, that no errors are being printed to the console (Window > Console > Logging) when building, and that those banks are correctly placed in the directory FMOD is loading banks from?