homeassistant

I'm pretty new to HA. I've set it up and I keep editing the confirmation and everytime I restart to apply the changes, all the switches, sensors and even the thermostat lose their values. The most annoying is the thermostat (classic thermostat entity) because I have to turn it on selecting heat/cool and set the temperature. Is there a way to keep all these values across restarts?

Edit: I'm using HA OS on Proxmox. All the sensors and switches slowly goes back to "normal" as soon as they publish their state, apart from some entities that have values provided by HA itself and not by the devices (like the thermostat).