I have exactly the same problem.
It's obvious that Samsung is postponing the final version of UI 7 on purpose.
None of my friends with Samsung Galaxy S25 Ultra 5G have any problem, so far.
The Samsung Galaxy S24 Ultra 5G 12/256
is currently available for around £800
and it's an unbeatable value and offer.
Because to be honest,
Samsung Galaxy S25 Ultra 5G is just slightly better than its predecessor,
but for a lot more money.
So Samsung is trying to sell as much S25 Ultra 5G as possible,
before the stable version of android 15 for S24 Series.
Even the regular S24 is available for around £500.
Samsung is copying Apple in this policy.
Just small and obvious improvements,
such as newer processors,
slightly better cameras,
display, plus some software AI "magic,"
but that's all.
The same design,
charging speed,
battery capacity,
even minus certain features such as Bluetooth in the S-Pen,
still nothing more in the box,
than before.
Samsung used to provide a wired headset,
while it was still equipped with the headphone jack,
plus, it was possible to easily replace the battery,
plus a charger,
plus a micro SD card slot.
Now we have nothing from these options anymore,
but Samsung did not
lowered the price,
because it took something out.
We get less,
but we're still paying the same money.