Just uploaded the same as you 23.1.A.1.28.
I have noticed no difference at all, haven't tried out everything yet.
I am very lucky, i have had no issues at all with this phone.
But one slight blemish, after opening and closing the vent for charging, the flap doesnt secure properly, i just bent the small pvc pin thing and its now fine.
I bought a magnetic charger now, and it works just fine.