Drew Adams <drew.adams@oracle.com> writes:

> But a guess about the regression for `isearch-allow-scroll' is that
> it also needs to be added here:
>
>  ;; Universal argument commands
>  (put 'universal-argument 'isearch-scroll t)
>  (put 'negative-argument 'isearch-scroll t)
>  (put 'digit-argument 'isearch-scroll t)
>
> IOW, add (put 'universal-argument-more 'isearch-scroll t)

Agreed.