alarm clock doesn't work properly

[DoggoD]

some time before, i've noticed that my alarm clock started to mismatch time that it must start on (e.g. setting it to 8:30 a.m., but it starts on 8:34 a.m. and some day even on 8:47 a.m.)..

i've found thread with similar problem (marked as "solved") here.. there i've found information about clock app version 20.2.A.1.18.. as i can understand, it's requirements is android version 5+..

my c4 android 6 is 27.3.a.0.173 build.. and it does not show me updates for clock app, which is version 20.1.a.0.9.14 for now..

any way to fix it in the future or maybe some workarounds?

thanks in advise..

[DoggoD]

apparently, problem exist when "Sony clock" is chosen for lock screen..

was able to reproduce this problem several times..

with simple "Digital clock" everything is OK..

question about "clock app version 20.2.A.1.18" not being offered to C4 is still there..