Pool heater button switching on by itself

Recently I reported that I had to use the Spa button on the heater to heat the pools instead of the Pool button because the Pool button was not working. However, from time to time, the Pool button switches on by itself with a different temperature setting. I can’t change the temperature setting after this happens. I have to press the Off button to turn the heater off and then resume using the Spa button. Can someone come and take a look?

Thanks!