The Penta Sata top board has the switch connected to the Rock Pi 4 GPIO, to sense the button being pushed. However this button does not have either of a passive pullup on the GPIO nor a resistor pullup. That means that you can get noise and random actuation.
It may be possible that you are seeing a manifestation of this.
For another user their problem is discussed in the entry:PENTA SATA KIT - Fan randomly stops causing overheating
I had done some work on the Penta Sata software, documented in: Penta SATA HAT enhanced display (oled, I/O, temp) and operation (button, fan)
in which one of the photos shows how you would put a resistor pullup onto the switch to get dependable operation, if this is your problem.