Safari macOS – No Horizontal Scroll: Bug or Preference?

safariscrolling

Mac Pro 5,1 Mojave, Safari [latest] 14.1

Since the last Safari update in the last week, I've lost the ability to shift/scroll to move horizontally.
Fine in Chrome, Finder etc, this seems to just be Safari.
Did a pref slip somewhere? I've never really tried to find if this is a pref, I thought it 'just happened'.

If it's a bug I'll report it, but I'd like to know if I missed a pref.

Screenshot hopefully wide enough to display this. Click the image, then if you see a magnifying glass with a + in it when you hover your cursor over the letters, click again so it goes beyond your window size [or repeatedly tap Cmd ⌘ + until it no longer fits the window].
Hold Shift & scroll mouse wheel.

enter image description here

It would be interesting to know if this affects trackpads too, but I don't have one to test.

Best Answer

Update
Now seems to be fixed in latest release of AdGuard.

It's an issue with AdGuard, specifically the Web Annoyances Ultralist.

Reported to the developers in https://github.com/AdguardTeam/AdguardFilters/issues/82833

with a dev response

Ok, better disable this filter. It can break something in Safari, also our filters compiler has one issue AdguardTeam/SafariConverterLib#21 After release which will contain the fix for problem above, you can try that filter again.

I have that filter disabled for now & will test again after the next release.

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