@ajalkane
On my device, a XA2, with SFOS 3.2.1.20 RingingRestorer does not eeally work correct.
The daemon is up and I can set the amount of time and if I apply the restore time (even with default 15 min) the device goes into silent mode.
But I found it a lot of times (almost always) that device gave me ring and signal tnes. Checking the mode I found the mode was set back to ringing mode. First I thought I had activated it accidentally but just now I found it like :
setting into silent, letting screen saver chime in (have device lock set but only activated after 4h), putting device aside fir two minutes. Opening with button press and swipe and checking mode: ringing mode.

Something more to provide to you?