...Whoopsy! :o

Problems installing here too: 80% -> preparing to install updates -> Some updates were cancelled. We'll keep trying in case new updates become available.

Have they 'pulled' the update, I wonder?

Dencal,

no worries, I just thought it may be of interest to the forum. I've reported it thru' Feedback.

To clarify the procedure:

ISO made using UUP, as soon as update had downloaded. Then...

Here you go:
126027

[EDIT]

UUPtoISO used to create the ISO

After a clean install:
126021

...nothing in the release notes for this one, at least none that I can find.

[EDIT]

This is the same after updating and rebooting.

[EDIT_2]

Noted.

...you could always try Adguard. Runs as a system service and performs flawlessly; browser agnostic.

(Usual disclaimers; no affiliation, etc...)

I had this issue a few builds ago - can't recall which - and it was resolved when I used an updated Samsung Magician.