The confirmed problem is a mysterious phenomenon in which the upper limit of the BPM setting value is limited to 120 BPM, but this has been normalized at some point in the process of checking the UI.　However, the cause of the problem must be identified due to the suspicious the behavior.

For the time being, I have increased the number of the sub routine to redraw the LCD, to ensure that the result of the output of lower rotary encoder which sets BPM is reflected in the LCD and see how it goes.