Pressing Tab to accept a suggestion does not work in insert-paste mode (i.e. with :set paste). One must revert to :set nopaste to have it work again.
$ sudo add-apt-repository ppa:jonathonf/vim
$ sudo apt update
$ sudo apt install vim
$
$ vim --version
VIM - Vi IMproved 9.0 (2022 Jun 28, compiled May 10 2022 08:40:37)
Included patches: 1-749
...
Pressing Tab to accept a suggestion does not work in insert-paste mode (i.e. with
:set paste
). One must revert to:set nopaste
to have it work again.