Sony – alarms and notifications
Source: Don’t kill my app
Sony gets a high rank in our listing of toxic Android vendors as historically it was Sony who introduced the first very effective non-standard background process optimization and opened the Pandora’s box.
It is called Stamina mode and it instantly breaks all background processes and all alarms if enabled.
Never use Stamina mode if you want your phone to do something useful when you are not actively using it.
Try to make Circadian not battery optimized in Phone settings > Battery > Three dots in the top right corner > Battery optimisation > Apps > Circadian.